DAZZ Grip Classic Shelf Liner, Chili Pepper, 18" x 5'

After a good many years this product stuck to the shelving. How is the best way to remove it from the shelves

Will this grip to a steel surface (I have a huge spice rack with steel shelves)

Can the mat be placed under toaster oven without melting?

I ordered very berry and uou sent white, why?