Dr my 12 yr old granddaughter trying to help prep dinner tonight didn't take the saran "cling wrap" off the cubed potatoes before throwing them in the oven for 40 minutes. When we removed the glass dish, and I had a laugh, the cling wrap appeared to melt on the side of the dish and the part covering the food came off in one piece. Should we scrap the dish...the potatoes cooked in olive oil and rosemary look good but I'm concerned.