Cloth makeup:
This method, which is the simplest and fastest, consists of passing a cloth soaked in vinegar over the stain. This ingredient, in fact, is a natural deoxidizer that removes the yellow or black stain by thoroughly polishing and disinfecting. If the stain doesn’t come out, apply vinegar directly to it and wipe about 30 minutes later.
Lemon :
This citrus fruit also has disinfectant and lightening properties, which help eliminate stains. Rub half a lemon directly on the dark stain, leave to act for a few minutes then clean with a cloth. Repeat if the stain doesn’t come out.
Borax :
It is one of the most powerful ingredients for removing stains on almost all bathroom surfaces. Apply borax directly to the stain, then pour vinegar over it. After 20 minutes, scrub with a sponge, then rinse with water and dry well. Wear gloves and a mask while applying borax.