Caring for your Tempered Glass Covers
Do not place glass covers on a burner, in a toaster oven, under a broiler, or in the microwave oven. The heat will weaken the cover. Be careful not to strike the glass cover when coking, storing, cleaning or serving and do not use them if chipped, cracked, or severely scratched. Do not attempt to repair them if chipped or broken and never reverse the glass covers when storing as the knobs may damage the nonstick interior.