When we moved to this house 3 years ago, there was mold around the bathtub and the wall. We cleaned it off the best we could and put a rubber thing that goes in the crack, on the bathtub. I had been suspicioning that there was mold growing for awhile, and then one day the glue popped off of that rubber seal and exposed a big, gross mess of mold. I finally got down on my knees for 2 days last week and scraped every single piece of mold off of the tub and dug all the caulking out. It is moldy behind the tub insert too, because the idiots that did this bathroom, did not do it right. I did the best I could to clean it up and sprayed a bleach spray on the places that I could reach on the wall, and then sealed it all back up very good. We can't afford to re-do the whole bathroom right now, but I did the best that I could to seal it off. I think our allergies have been improved, but I couldn't stand the fact of knowing all of that gross mold was behind there.