Hello, I posted about 1 ½ weeks ago about a backsplash 3” x 12 subway tile job I was concerned about because two tiles popped off during clean up. This was before grouting. I used Mapei type 1 mastic and a ¼” x ¼” notched trowel. I got some responses that maybe I used too much mastic and even though I waited 24 hours too clean, maybe the mastic had not dried. I left the backsplash for about 1 ½ weeks too see if by waiting the bond would be strong. I now want to test it by trying to pop off tile/tiles. What I’m not sure of is, on drywall, with no grout, how strong should the bond be? Meaning should I expect the drywall to come off in chunks? Should the tiles break? Again this is before grouting…. What am I looking for?