Reply To: Blech on a glasstop oven? Home › Forums › Shabbos! › Blech on a glasstop oven? › Reply To: Blech on a glasstop oven? September 8, 2010 4:33 am at 4:33 am #695060 ny100kParticipant It is risky. If it gets too hot the glass can and will shatter. Its happened to me.