You can clean the borosilicate whiskey glasses using a dishwasher or with your hands, as you prefer. Here are the detailed steps to keep your whiskey glasses clean when doing hand washing:-Mix vinegar in water or use a mild soap or liquid detergent.Scrub softly with a gentle brush or sponge.Rinse the glasses well with lukewarm water gently.If you notice a build-up of whiskey residue or smell that you can not keep away, use the same mixture to initiate the cleaning process from the beginning.Dry the glasses with a clean and soft piece of cloth to prevent spots of water.Store the whiskey glass set in a clean and dry area on a rack to avoid scratches.