You can wash plastic dishes by hand using liquid dishwashing detergent or laundry soap.
It is not recommended to use bulk substances that have small abrasive particles.
This detergent can damage the top layer of plastic.
One of the gentlest ways to clean plastic from yellowness is to simply wash the surface with dishwashing detergent.
To do this, apply it to the soft side of the sponge and rub the plastic surface.
If the yellowness remains, use another gentle method: Grate a little laundry soap.
To remove a stain, you need to wet the container, sprinkle a little soda on the stain and, after waiting a few minutes, thoroughly wipe the stain with a sponge.
A melamine sponge is good for dealing with old stains.
After wetting the container, wipe the stains with this sponge.
It must be dry.
Mustard powder will help get rid of yellowness.
In addition to removing stains, it will also act as a good abrasive.
In this case, you can do without adding water.
The powder must be applied to the contaminated area, rub it in a circular motion into the surface, and then rinse with water.