How to remove stains from a SILGRANIT sink?
Stubborn stains can be removed by pouring a little warm vinegar or vinegar-based cleaner into the sink and allowing it to sit for a few minutes. Rinse with clean water and dry.
Food stains – depending on the severity of the stain, use a bleach water solution or pour the bleach onto a cloth and cover the stain. Allow the bleach to sit for at least 1/2 hour and then clean with dish detergent and water.