How to clean Lego® - Our step-by-step guide

🗓 Mon, 13 Feb 2023

From building intricate models and Lego® MOCs, to simply enjoying the tactile sensation of clicking bricks together, there's something about Lego that inspires creativity and sparks joy. However, with frequent use and play, Lego bricks can become dirty and discolored, diminishing their appearance and overall play value.

Cleaning Lego may seem daunting, but with the proper techniques and tools, it can be a simple and satisfying process. In this step-by-step guide, we'll walk you through the best and safest methods for cleaning your bricks, figures, and pieces so that you can ensure that your Lego pieces will stay in top condition for years to come.

Preparing to clean your Lego®

Cleaning Lego® can be challenging because of the small size and intricate shapes of the Lego pieces. Lego pieces can also be fragile, and some cleaning methods can cause damage to the pieces. Here’s how you can be sure that your Lego pieces are safe while you clean:

Before you start cleaning your Lego, you'll need to gather your supplies.

  • Soft cloth
  • Clean sponges
  • Mild detergent
  • Bowl of warm water
  • Soft toothbrush
  • Container

After gathering your supplies and the Lego pieces you will clean, you will need to sort the Lego by color or size, this will make it easier to find the pieces you need when you start building and will help you find the exact piece you need for any project or design.

You can also create a workspace and make sure to keep it clean and tidy. Once done, it’s time to start cleaning!

Preparing to clean your Lego®

Hand washing your Lego®

Handwashing your Lego® pieces is the simplest way to get them clean. It’s also a great option if you don’t want to spend money on cleaning supplies. All you need is a sink filled with warm, soapy water, a small brush, and some clean sponges. Here's a step-by-step guide to do it right:

1. Soak the Lego® in warm, soapy water

Fill a sink with warm, soapy water. Be mindful not to use water that is hotter than 104°F / 40°C. Add a few drops of mild, non-abrasive detergent. Place the Lego® pieces in the water and let them soak for at least 10 minutes. This will loosen any dirt or grime that may be clinging to the pieces. You can also try using a weak vinegar solution to remove tougher stains from your Lego pieces.

2. Scrub the Lego® with a soft-bristled brush

Scrubbing your Lego® sets with a brush will not only remove dirt, but it will also help remove any stickers or labels that may have been left on the pieces. This is especially important if your kids have been buying used sets from other kids or from garage sales. You don't want them playing with pieces that have old labels on them.

3. Rinse the Lego® thoroughly

Once you have cleaned the Lego®, it is important to rinse it with clean water. This will remove any soap residue that may be on the surface of the Lego.

4. Dry the Lego®

The best way to dry your Lego® pieces is to lay them out in a single layer on a towel or paper towel. Make sure there is enough space between each piece so that air can circulate freely, and avoid stacking the pieces on top of one another. Remember not to leave them in direct sunlight to dry, as this may damage the Lego pieces.

To help speed up the drying process, you can use a fan to blow air over the pieces. However, don’t dry them in the oven, the microwave, or with a hair dryer.

Restoring Discolored Lego® Pieces

Over time, the plastic used in Lego® pieces can become exposed to UV light and oxygen, which can cause the plastic to be yellow or discolored. This process is known as "plastic degradation," and it is a common issue that affects many types of plastic products.

Restoring Discolored Lego® Pieces

If you want to clean to restore discolored Lego pieces, here are some methods:

Soak in Warm Water and Soap

One of the easiest ways to remove discoloration from Lego® pieces is to soak them in a solution of warm water and mild dish soap. This method is gentle and can be effective for removing surface dirt and grime, as well as light discoloration.

Use Hydrogen Peroxide

If your Lego® pieces are heavily discolored or have yellowed over time, you may need to use a more powerful cleaning agent. Hydrogen peroxide can be effective at restoring the original color of your Lego pieces, but it should be used with caution. Hydrogen peroxide can be strong and may damage certain types of Lego pieces, such as those with metallic or chrome finishes. Be sure to test this method on a small, inconspicuous area first to avoid damaging your Lego.

Use a Plastic Cleaner

There are also specialized plastic cleaners available that are designed specifically for cleaning Lego® pieces. These cleaners are formulated to be gentle on plastic but effective at removing discoloration and stains. But be sure to follow the manufacturer's instructions carefully when using a plastic cleaner, and test it on a small area first to avoid damaging your Lego.

Why clean your Lego®?

By keeping your Lego® clean, you can help ensure that it lasts for a long time and remains in good condition. Here are other several reasons why keeping your Lego clean is important:

  1. For health and hygiene. Cleaning Lego is especially important to avoid the accumulation of bacteria and germs on the Lego from different people.
  2. For a smooth and enjoyable building experience. Keeping your Lego clean can help ensure that the bricks fit together easily.
  3. For a better Lego creation appearance. Clean Lego bricks have a more polished and professional appearance than dirty ones, which can make your creations look better overall.

If you are thinking of investing in Lego sets, regular cleaning can also help ensure that your Lego sets remain in top condition and retain their value over time.

Tips for maintaining clean Lego®

While properly cleaning your Lego® is important, proper maintenance of your Lego sets is also essential for ensuring that they remain in pristine condition and last for years to come. To help you keep your Lego looking its best, here are some tips:

  1. Store correctly. Store your Lego pieces in a clean and dry environment, away from dust and dirt. You can use Lego storage boxes to keep them protected.
  2. Use clean hands. Handle your Lego pieces with clean hands to prevent transferring dirt and oils onto them.
  3. Regularly dust off your Lego sets. Use a soft-bristled brush or a dry, lint-free cloth to remove any surface dirt or debris.
  4. Avoid eating or drinking near your Lego. Spills or crumbs can attract dirt and dust, which can accumulate on the Lego pieces over time.

Here’s a list of the best Lego storage ideas that can help you keep your Lego pieces organized, protected, and easily accessible.

Cleaning Lego®: FAQ

Here are some frequently asked questions about cleaning Lego®:

Can I use bleach to clean Lego®?

It's not recommended to use bleach to clean Lego® as it can damage or discolor the pieces.

Can I clean Lego® in the dishwasher or washing machine?

Using a dishwasher or washing machine when cleaning your Lego® is not recommended. The plastic used in Lego pieces is not designed to withstand the harsh mechanical action of a washing machine. The high speed and pressure of the machine can also cause the pieces to bump against each other, resulting in scratches, cracks, or other types of damage.

Cleaning Lego®: FAQ

Can I use a vacuum to clean my Lego®?

Yes, you can use a vacuum to clean your Lego®, but be sure to use a dusting brush attachment to avoid scratching the pieces.

How often should I clean my Lego®?

The frequency of cleaning your Lego® pieces will depend on how often you use them and how dirty they get. If they are visibly dirty, it's a good idea to clean them.


Keeping your Lego® pieces clean is essential for maintaining their quality and longevity. By following our step-by-step guide, you can safely and effectively clean your Lego pieces. By taking the time to clean your Lego regularly, you can keep them looking and working like new, and continue to enjoy hours of imaginative building and play.

Need more tips so you can enjoy your Lego sets and pieces to the fullest? Check this guide on how to manage your Lego collection to preserve the value of your Lego pieces, so you can continue to enjoy them for years to come. You want to buy Lego sets at a low price? With Brickfact price comparison you can choose from a list of sellers and buy Lego sets at the best price. The Brickfact app informs you via push notification as soon as a new Lego deal is available. The Brickfact app is free and available for both iOS and Android.

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