How To Clean/Wash Your Used Legos In Bulk  

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Are you tired of playing with grimy, dusty Lego bricks that have lost their luster? Having trouble with cleaning your ever-growing Lego collection? Look no further, my friend!

In this extensive guide, we’re going to walk you through the ins and outs of how to clean and wash your used Legos in bulk, so you can bring your once-magnificent Lego masterpieces back to life.

We’ll dive headfirst into the nitty-gritty of gathering and sorting your Lego collection, preparing the right tools and supplies, and the most effective techniques for washing, scrubbing, rinsing, and drying your beloved plastic treasures. But wait, there’s more!

We’ll also explore ways to sanitize, store, and maintain your Legos in tip-top shape. So grab your favorite beverage, buckle up, and let’s embark on this exhilarating journey towards a spotless Lego collection!

Gathering and Sorting Your Lego Collection

Inspecting individual Lego pieces

Before we start this cleaning extravaganza, let’s take a moment to appreciate the incredible variety of Lego bricks and pieces we’ve collected over the years.

As you sift through your collection, you’ll likely encounter an eclectic mix of standard bricks, technic parts, mini-figures, and the occasional dreaded non-washable electronic component.

In my experience, it’s essential to take your time and inspect each piece, looking for cracks, loose stickers, or faded prints. You might also find yourself reminiscing about that mind-blowing Death Star build that took you weeks to complete.

Ah, the memories!

Sorting Legos by size, color, or type

Now that you’ve inspected each piece, it’s time to roll up your sleeves and start sorting. There are several ways to approach this task, and the choice is yours based on personal preference.

Some folks like to sort by size, separating those tiny 1×1 plates from the monstrous 32×32 baseplates. Others opt for color-coding their collection, creating a mesmerizing rainbow of plastic glory.

However, my favorite method is sorting by type. I find it helpful to separate standard bricks, plates, slopes, and more exotic elements like mini figures or those pesky technic pins.

This way, I can tackle each category with the cleaning method that suits it best.

Importance of separating electronic and non-washable parts

I cannot stress this enough: always, and I mean always, separate any electronic or non-washable components from the rest of your collection. You don’t want to end up with a waterlogged Power Functions motor, do you?

Trust me, I’ve been there, and it’s not a pretty sight.

Keep an eye out for battery boxes, light bricks, sound bricks, and any part that might have a sticker or delicate print that could be damaged by water. Set these aside, and we’ll address them in a later section.

Essential Supplies for Effective Lego Cleaning

List of necessary cleaning tools and materials

Now that we’ve got our Legos sorted, let’s make sure we’ve got all the right tools for the job. Here’s a handy checklist of supplies you’ll need for this adventure:

  • Large containers or buckets
  • A mild detergent or soap
  • Warm water
  • Soft-bristled brushes (e.g., toothbrushes or nail brushes)
  • A mesh laundry bag or fine-mesh sieve
  • Soft towels or microfiber cloths
  • A hairdryer (optional)

I’ll admit, I was a bit overwhelmed when I first gathered all these materials, but trust me, they’re worth their weight in gold when it comes to cleaning your Legos.

Choosing the right cleaning solution

When selecting the perfect cleaning solution for your Legos, it’s crucial to pick a mild detergent or soap that won’t damage your precious plastic. Keep in mind that harsh chemicals or abrasive cleaners can cause discoloration, fading, or even weaken the structural integrity of your bricks.

In my experience, I found that gentle dish soap or a mild laundry detergent works wonders.

Here’s a table of some recommended cleaning solutions and their properties:

Cleaning SolutionProsCons
Mild dish soapEasily available, gentle on LegosMay require more rinsing
Mild laundry detergentEffective in removing grime, gentle on LegosMay require thorough rinsing, some may contain bleach
Baby shampooGentle, less likely to cause discolorationMight be less effective on stubborn dirt

Remember, a little goes a long way – you don’t need a mountain of suds to get the job done!

Importance of using gentle and non-abrasive cleaning agents

As we’ve mentioned, using gentle, non-abrasive cleaning agents is of utmost importance when dealing with your treasured Lego collection. Aggressive cleaners can strip away colors, leave scratches, or even warp the plastic.

Plus, nobody wants to be greeted by a disfigured minifigure head, am I right?

The key here is to be mindful of the cleaning agents you choose and always err on the side of caution. Trust me, your Legos will thank you!

Preliminary Dust Removal Techniques

Using a vacuum cleaner with a brush attachment

Before diving into the deep cleaning process, let’s tackle the pesky dust that’s been lurking on your Legos. A vacuum cleaner with a brush attachment is an excellent tool for this purpose, as it’s gentle enough to prevent any damage to your bricks.

Simply run the vacuum cleaner over your Lego pieces, and watch as the dust magically disappears. In my experience, this method works best for larger bricks and plates, as it can be less effective for smaller, intricate parts.

Employing compressed air cans for hard-to-reach areas

Sometimes, a vacuum cleaner just can’t reach those tight nooks and crannies where dust tends to hide. Enter the mighty compressed air can!

This little wonder can blast away dust from even the most stubborn crevices in your Lego collection.

While using compressed air cans, remember to hold the can at a slight angle to prevent any moisture from escaping, and always follow the manufacturer’s instructions. A quick burst of air is usually enough to dislodge any lingering dust particles.

Importance of proper ventilation during the dusting process

As you’re embarking on this dust-busting mission, it’s vital to ensure proper ventilation in your workspace. Dust can irritate your respiratory system and create an unpleasant environment, so open those windows or set up a fan to keep the air circulating.

Not only will this make the dusting process more enjoyable, but it’ll also help keep your sinuses and lungs happy!

The Soaking Method: Simple and Effective

Preparing a soaking solution with warm water and mild detergent

Now that your Legos are dust-free, it’s time for a good ol’ soak! Start by filling a large container or bucket with warm water – not too hot, as extreme temperatures can warp or damage your bricks.

Next, add a small amount of your chosen mild detergent or soap. You’re aiming for a gentle, sudsy solution that’ll help loosen dirt and grime from your Lego pieces.

Determining the appropriate soaking duration

The soaking duration largely depends on the level of dirt and grime on your Legos. For mildly dirty pieces, 30 minutes to an hour should suffice.

However, for more stubborn dirt or long-neglected collections, a longer soak of up to 24 hours might be necessary. Here’s a quick reference table for soaking times based on the dirtiness of your Lego pieces:

Dirtiness LevelSoaking Duration
Mild30 minutes to 1 hour
Moderate1 to 4 hours
Heavy4 hours to 24 hours

Remember to keep an eye on your Legos during the soaking process, and don’t hesitate to give them a gentle stir from time to time to help dislodge any grime.

Using a mesh laundry bag or fine-mesh sieve for smaller Lego pieces

When dealing with smaller Lego pieces, it can be a real pain to fish them out of your soaking solution. To save time and frustration, I recommend using a mesh laundry bag or a fine-mesh sieve to keep those tiny parts contained.

This will make the soaking and rinsing process a breeze, and you won’t have to worry about accidentally sending your favorite Minifigure head down the drain.

Scrub-a-Dub-Dub: Giving Your Legos a Thorough Scrub

Utilizing soft-bristled brushes for effective, yet gentle scrubbing

Once your Lego pieces have had a nice soak, it’s time for some hands-on scrubbing action! Grab a soft-bristled brush, such as a toothbrush or nail brush, and gently scrub away any remaining dirt and grime.

Be sure to tackle every nook and cranny, paying special attention to those pesky areas where dirt tends to accumulate, like the inside of hollow studs or the seams between bricks.

Cleaning minifigures and printed pieces with extra care

Minifigures and printed pieces require extra TLC during the scrubbing process. Excessive force or abrasive brushes can damage delicate prints or scuff your minifigures’ faces, leaving them looking worse for wear.

To avoid this, use a soft cloth or an extra-soft toothbrush and apply gentle pressure when scrubbing.

Rinsing your Lego pieces thoroughly to remove soap residue

After you’ve scrubbed your Legos to squeaky-clean perfection, it’s time to rinse away any soap residue. Fill a separate container with clean water, and gently swish your Lego pieces around to remove any remaining suds.

For smaller pieces contained in a mesh laundry bag or fine-mesh sieve, simply hold them under running water, ensuring that all soap is washed away.

Drying Your Legos: The Final Step

Using soft towels or microfiber cloths for initial drying

Once your Lego pieces are thoroughly rinsed, it’s time to dry them off. Spread a soft towel or microfiber cloth on a flat surface, and lay your Legos out in a single layer.

Gently pat them dry with another towel or cloth, being careful not to apply too much pressure or rub them together, as this can cause scratches or damage.

Allowing your Lego pieces to air dry completely

After patting your Legos dry, let them air dry for a while to ensure that any remaining moisture evaporates. This step is crucial to prevent mold or mildew growth, especially in hollow areas like the insides of studs.

Depending on the humidity in your area, this may take anywhere from a few hours to a full day.

Using a hairdryer for faster drying (optional)

If you’re short on time or simply can’t wait to start rebuilding your Lego masterpieces, you can use a hairdryer to speed up the drying process. Set the hairdryer to its lowest heat setting, and keep it at a safe distance from your Legos to avoid melting or warping the plastic.

Gently blow air over your Lego pieces, rotating them as needed to ensure even drying. Be cautious not to lose any small parts in the process!

Sanitizing and Storing Your Legos

Sanitizing your Lego pieces (optional)

In some cases, you might want to sanitize your Lego pieces, especially if they’ve been exposed to germs or allergens. To do this, mix a solution of one part white vinegar to ten parts water in a spray bottle.

Lightly mist your clean, dry Lego pieces with the solution and allow them to air dry. The vinegar will help kill any lingering bacteria or allergens without damaging the plastic.

Storing your Lego collection to prevent dust buildup

Proper storage is key to maintaining a clean and dust-free Lego collection. Consider using plastic storage containers with tight-fitting lids to keep dust at bay.

You can also use resealable plastic bags or smaller containers for individual sets, mini-figures, or smaller parts.

To further prevent dust buildup, consider storing your Lego collection in a cool, dry place away from direct sunlight. This will also help prevent fading or discoloration from UV exposure.

Maintaining and Caring for Your Lego Collection

Cleaning non-washable parts and electronics

Earlier, we set aside non-washable and electronic components for special treatment. To clean these parts, use a soft, damp cloth to gently wipe away any dust or dirt.

Be careful not to get any water on electronic components or in battery compartments, as this can cause damage or corrosion.

Reapplying stickers and fixing damaged prints

Sometimes, the cleaning process might cause stickers to peel or prints to fade. If this happens, you can attempt to reapply the stickers using a small amount of clear glue.

For damaged prints, you might consider purchasing replacement parts or using a fine-tipped paintbrush and acrylic paint to touch up any imperfections.

Establishing a regular cleaning routine

To keep your Lego collection looking its best, establish a regular cleaning routine. Depending on the size of your collection and how often you use your Lego pieces, this might be monthly, quarterly, or yearly.

The more often you clean your Legos, the less time-consuming and labor-intensive the process will be.

Developing a system for managing new Lego acquisitions

As your Lego collection grows, it’s crucial to have a system in place for managing new acquisitions. Consider washing and sorting any new-to-you used Lego pieces before adding them to your collection.

This will help prevent the spread of dirt and dust and make future cleaning sessions more manageable.

What is the Best Way to Clean All of Your Legos at Once?

Cleaning your entire Lego collection in one fell swoop can seem like a daunting task, but it’s possible with the right techniques and a bit of organization. To clean all your Legos at once, you’ll want to follow a streamlined process that maximizes efficiency without sacrificing the quality of the cleaning.

Here’s a step-by-step guide to help you tackle this colossal task:

Sorting and separating your Legos

Before you begin, sort your Legos into categories based on size, type, and washability. As mentioned earlier, separate non-washable parts, electronic components, and delicate printed pieces to avoid damage.

This will also make it easier to manage the cleaning process for each category.

Scaling up the cleaning process

To clean a large number of Lego pieces at once, you’ll need to scale up the cleaning process. Use larger containers or even a bathtub for soaking, and consider investing in multiple mesh laundry bags or sieves for small parts.

You may also want to have several soft-bristled brushes on hand to make the scrubbing process more efficient.

Cleaning in batches

Even when cleaning all of your Legos at once, it’s a good idea to work in batches. This will make the process more manageable and prevent your workspace from becoming cluttered.

Divide your Lego collection into smaller groups based on size or type, and clean one batch at a time. This will help ensure that each piece gets the attention it deserves.

Enlisting the help of friends or family

Cleaning your entire Lego collection can be a time-consuming task, so why not enlist the help of friends or family? Turn it into a fun and engaging activity by assigning tasks or holding friendly cleaning competitions.

Plus, many hands make light work, and you’ll have your entire Lego collection cleaned in no time.

Drying and storing efficiently

When drying a large number of Lego pieces, you’ll want to make the process as efficient as possible. Use multiple soft towels or microfiber cloths and spread your Lego pieces out in a single layer.

To speed up the air-drying process, set up fans or use a hairdryer on the lowest heat setting.

Once your Lego pieces are clean and dry, store them in proper containers to keep them dust-free and organized. As mentioned earlier, use plastic storage containers with tight-fitting lids or resealable plastic bags to prevent dust accumulation.

By following this efficient and streamlined approach, you can clean all of your Legos at once and restore them to their former glory.

Remember, a well-organized and systematic cleaning process is the key to tackling a large Lego collection.


Well, there you have it! A comprehensive guide to cleaning and caring for your Lego collection. With these tips and techniques in your arsenal, you’ll have your Lego pieces looking as good as new in no time.

Now go forth, armed with your newfound knowledge, and breathe new life into your once-grimy Lego bricks. Happy cleaning!

Matthew R

Hi, My name is Matt and I am all about toys! When trying to find accurate information online about toys I was finding it difficult so I decided to make this site.

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