My walk-in shower is new (within the past 6 months). Since shortly after first installing the tile, the grout has cracked in various places (mostly along seams). I keep replacing it and re-sealing it, but it continues to crack. Any ideas on what is causing this and how I can prevent it from happening again? Should I be mixing the grout with something special? Also, the areas that I caulk also have a problem, the caulk peels off. What could be be causing this? Thanks for any help.
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