We recently bought a house about 15 yr old. The master shower is tiled wall and floor. The shower grout around the bottom was black. I have used bleach and cleaned, but its still black in places and I realized in many places the grout is gone or there's a gap. My husband was going to caulk to fill cracks and cover the black. I dried it and saw water in crack. I have been using paper towels to soak up the water out of the crack and a fan. Its still getting water (~ 7 days). Its only coming from one area on the side opposite the shower head. Should there be water down there? - I guess its coming from the shower pan. Does it need to be completely dry before we caulk? Will it cause a mold problem to caulk if there still water down there somewhere? Thanks, Annie