I don't know why this is happening. Surely there is no food on the tiles or bathtub. We have a fancy Delta tub faucet with the two levers - on for on/off and the other remembers the temperature setting. The plumber who came to fix the jet pump could not take the valve apart in order to remove the bezel so could look behind it to see if there is a water leak. I hesitate to do it working from the installation instructions because you have to adjust it internally for pressure & temp so the fancy levers work correctly.
But why would they come into the open if they are just using a leak for moisture?
But why would they come into the open if they are just using a leak for moisture?