Isn't that a riot!!
Some people look at me like I am nuts...and I may be...

...but I swear, 6 out of ten times I get this call...It's teenagers mad at Mom or Dad....or as in your case, a guest that is just visiting for the weekend...with
lasting impressions!!
Hey glad if this resolved issue for you. You may want to caulk that tile seam with new mildew resistant silicone/caulking!!
Thanks for update...Mark
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