Leaking tub... kinda
So I have an issue that's hard to diagnose. Our tub/shower on the second floor has a leak that drips down to the first floor along the wall that the tub sits above. The thing is, it doesn't leak everyday or even every week. But it does leak at least twice a month.
To try to figure out what the problem is I've tried a few things.
1) I ran the tub for a solid 30 mins. Not a single drip.
2) I filled the tub completely, since we have jets in the tub, thinking that it may be a leaky hose. Again, not a drip.
3) I also filled the tub to the point where water was entering the overflow to check that too. No drips.
My only remaining thought is that perhaps the caulking (which looks pretty good) is letting water under it when we run the shower. If I remember correctly, the bathtub was incorrectly grouted with sand grout all the way around the perimeter and in an attempt at a fix (maybe, very wrongly) I applied a good bead of caulk over the sanded grout. I may be remembering that wrong though, and the surround may have been caulked. Its been a few years. Oh, another thing to mention is that I did seal the sanded grout of the tile above the tub about a year ago with a 3 year sealer.
Anywho. At this point, are there other reasons we may be getting the leak? If it is likely the caulk/grout is the best solution simply to remove everything around the surround? Tips on doing this would be great!