High power cleaner for glass and hookah. Only stir into hot water and pour into the glass. Wait for 5-10 minutes and rinse.  Schmand Weg is a heavy-duty Glass Cleaner, particularly for the tears and stains of glass. How to use the Schmand Weg Glass Cleaner Stir in one teaspoon of Schmand Weg Glass Cleaner into hot water and pour into the glass. Wait for 5-10 minutes and rinse. Schmand Weg Glass Cleaner removes even the stickiest tar and stains. Important!! Use hot water and Schmand Weg only if the glass can tolerate that. Be careful with acrylic glass since Schmand Weg might discolor them. The glass might crack. If you’re not sure, ask your retailer. Specification: Net weight – 140 g