Product review (5 stars): Keeps dripping food from burning in you oven and sticking
I have purchased these once before and they lasted years.  They are the best thing to keep pizza cheese from burning on the bottom of the oven floor.  When the oven cools, pull it out and the ash just chunks right off in the trash.  I've washed and dried them by hand and placed back into the oven.  Wish everything was that simple to clean.