I will try to be more specific about problem. These are 6x8 " tiles
installed on new primed 1/2" plywood on 16" studs above the new tub.
Corners are caulked. There are hairline cracks about 25% of the area.
I noticed these about a month or two after job was done. (about 2
years) Have never used the shower because of the cracks. I maybe could
spray silicone sealer on the walls but don't want to take a chance.
Wondering what I should do.