Microwave use Before microwaving, apply lid with vent open to release steam during cooking. After removing the dish from the microwave, leave the vent open while the food is very hot to allow it to rest. If storing let the food cool then close vent. Microwaving foods high in sugar, fat, tomatoes or curries may mark or stain the silicone seal, but will not affect its usability. After oven cooking, ensure that the Thermoglass dish cools before covering with the Realseal lid. Do not use the Realseal lid in a conventional oven.
Thermoglass dishes with Realseal lids are dishwasher safe - do not scrub with harsh or abrasive scourers or cleaners. The silicone seal and air release button can be easily removed for cleaning when required. Always allow a hot Thermoglass dish to cool before washing or rinsing (including in a dishwasher), refrigerating or freezing.