My bed formed bubbles when I heated it to 90C. So I removed the cover and now print on the glass surface that the cover was glued to. It is a nuisance to remove but just takes some time. I didn’t have strong solvents to try for removing the glue. Alcohol worked but slowly. I use Aquanet hair spray on the glass - extra heavy all weather. Just don’t get it in your hair. The glass is black and looks very good.