Things You'll Need
Instructions
Fill a large bowl halfway full with hydrogen peroxide. Add 2 to 3 tbsp. of oxygenated laundry detergent to the bowl, and mix with a paint stirring stick.
Place your yellowed LEGOs into the bowl, and agitate gently with the stirring stick. Allow the LEGOs to sit undisturbed in the mixture overnight or until the yellow cast is no longer visible.
Place the strainer in your sink, and empty the bowl into it. Run fresh water over the LEGOs, to rinse way any remaining solution. Shake the strainer gently to remove excess water.
Arrange the LEGO pieces on a towel, and allow them to dry completely.