Product review (4 stars): They fall out of my grate easily, and we have had to try 3 different ...
They fall out of my grate easily, and we have had to try 3 different kinds of adhesive to make them stick through the exposed heat and the dishwasher.  It's better than not having any pads on the grates at all, but definitely annoying when they fall out every time you lift the grates.