Clean white silicone wristwatch
Unfortunately, white silicone watches tend to discolour easily.
Either the white turns yellow after a few months, or it easily takes on the color of other garments with which the watch comes into contact.
My white watch had a light pink glow after coming in contact with a bright red denim jacket.
Since I have a cheap, not waterproof model, I did not want to work with water and detergents or baking soda.
I experimented a bit and had good success with glass cleaner.
I sprayed a piece of household roll a few times and put the watch on it.
Then rubbed vigorously.
I am very satisfied with the result.