several grate pads fell out/lost /broke during cleaning

The only real issue was locating the proper adhesive to ensure that the new pads would not fall out. The small insert paper slip in the package noted that a RTV adhesive should be used. After much searching at the home improvement super store, I learned it would be found at an auto supply store. It is black, and is for high temp use. It is available in a small tube for around $2.00. The RTV is usually used to make gaskets for heat/oil exposure in auto repair. I did have trouble removing a broken stub from a pad that had broken off in the hole. I used an awl to get what I could and push the rest into the hole deeper, then insert a new pad with along with the adhesive.