White plastic turns yellow after some time due to a chemical reaction that occurs when it is exposed to light, oils, etc. Below are different ways to get rid of yellow stains.
Remove the Stain With Baking Soda:
Baking soda may help to lighten the yellowed plastic. Take 1 cup of baking soda into a bowl and add enough water to make a thick paste. Apply it to the stained areas of your containers and scrub gently with a sponge. Now, leave this for 10 minutes. Rinse off and allow to dry completely before reusing. It may take several tries to lighten the plastic completely.
Remove the Stain With Lemon Juice:
Lemon juice is very effective for removing stains. Slice a lemon in half and squeeze the juice into a bowl. Dip a sponge into the lemon juice to soak it. Rub this on the stained area of your containers, then set it outside in the sunshine for at least 1 to 2 days and then rinse off. The sun and lemon juice work together to remove the stains.
Remove the Stain With Bleach:
Bleach helps to remove stains and discolorations. Take 1 tablespoon of bleach into a bowl and add 1 cup of water. Fill your plastic container with this solution and let it soak for about half an hour. After soaking in the solution, give the container a good scrubbing with warm water and let it dry.
Remove the Stain With Vinegar:
Mix equal parts of water and vinegar to create natural cleaning agent. Let the container soak in this solution for a few minutes. After soaking, wash the container as normal and let dry. If you are worried about the vinegar smell, then don‘t worry. It disappears after it dries.
