How to Clean LEGOs: A Comprehensive Guide

LEGO bricks and sets are fun and durable toys that can last for generations. However, they can also get dirty and dusty over time, especially if they are stored in humid or dusty environments. Cleaning your LEGO collection regularly can help preserve its value and appearance, as well as prevent potential health hazards. In this guide, you will learn how to clean your LEGO bricks and sets using different methods, tools and tips. You will also find answers to some frequently asked questions about cleaning LEGO.

How to clean LEGOs

The first step to cleaning your LEGO bricks and sets is to sort them by color and type. This will make it easier to wash them without damaging or discoloring them. You can use ziplock bags, plastic containers or mesh laundry bags to separate your LEGO pieces. The next step is to choose a cleaning method that suits your needs and preferences. There are several ways to clean your LEGO bricks and sets, such as:

  • Soaking them in warm water with mild detergent or vinegar for 10-15 minutes. This is a simple and effective way to remove dust and dirt from your LEGO pieces. You can use a soft-bristled toothbrush or a cloth to gently scrub any stubborn stains or stickers. Rinse them thoroughly with clean water and let them air dry on a towel or a drying rack.

  • Washing them in a dishwasher or a washing machine on a gentle cycle with low heat. This is a convenient and fast way to clean large batches of LEGO pieces at once. However, you should avoid washing any electronic parts, printed parts, stickers or transparent parts in this way, as they may get damaged or faded by the heat or water pressure. You should also place your LEGO pieces in mesh laundry bags or pillowcases to prevent them from getting lost or tangled. After washing them, let them air dry on a towel or a drying rack.

  • Wiping them with a damp cloth or a baby wipe. This is a quick and easy way to clean small amounts of LEGO pieces or sets that are not very dirty. You can use a damp cloth or a baby wipe to gently wipe the surface of your LEGO pieces, removing any dust or dirt. You can also use a cotton swab or a toothpick to clean any hard-to-reach areas or crevices. Let them air dry on a towel or a drying rack.


Here are some common questions and answers about cleaning LEGO:

How often should I clean my LEGO?

There is no definitive answer to this question, as it depends on how often you play with your LEGO, how you store them and where you live. However, as a general rule of thumb, you should clean your LEGO at least once a year to keep them in good condition.

How can I remove mold from my LEGO?

Mold can grow on your LEGO if they are stored in damp or humid places, such as basements, attics or garages. To remove mold from your LEGO, you should soak them in warm water with bleach for 10-15 minutes, then rinse them thoroughly with clean water and let them air dry on a towel or a drying rack. You should also disinfect the storage containers or bags that you use for your LEGO with bleach or vinegar.

How can I restore the shine of my LEGO?

Over time, your LEGO may lose their shine due to exposure to sunlight, dust or dirt. To restore the shine of your LEGO, you can use a plastic polish product that is designed for acrylics or polycarbonates, such as Brasso or Novus. You can apply the polish product with a soft cloth or a cotton ball, following the instructions on the label. You should avoid using any abrasive materials or chemicals that may scratch or damage your LEGO.


Cleaning your LEGO bricks and sets is an important part of maintaining their quality and value. By following this guide, you will be able to clean your LEGO collection with ease and efficiency, using different methods, tools and tips. You will also be able to prevent any potential health hazards caused by dust, dirt, mold or bacteria. Remember to always handle your LEGO with care and respect, as they are not only toys but also works of art.

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