I need some help in determining my next course of action. The shower floor is squishing/leaking around the perimeter of the tile floor at the grout line. I regrouted (Elmers tubed grout) several times but the grout never seems to completely dry.There are some spots where the grout spaces are a 1/2inch wide (probably due to settling). My guess is there's some moisture between the tile and the tile underlayment (pan,etc). Is there a product,technique or different grout that I could use before I have to rip up the tile floor. In addition, I had a plumber check under the house and the wood was dry and looked like new; guess I lucked out there. Thanks in advance. Jim