Fused glass items require special care…they can be hand-washed in warm water with a mild detergent. They are neither microwave nor oven safe. Please do not place in the dishwasher.
Use a clean cloth free of any food or dirt to prevent scratches during the washing. Also do a thorough drying of the glass after washing to avoid hard water spots on the glass. The fewer chemicals used in a cleaning agent, the better for your glass.