Hello, Hoping that someone can offer some insight into what is happening and if any precautions need to be taken. I recently started living in an older place that has had the bathroom redone. The bath/shower has white subway tile with black grout. I was cleaning the bath/shower with scrubbing bubbles and upon starting to wipe off the cleaner, I realized that the black color from the tile grout seemed to be wiping up into the rag I was using and starting to leak onto the white tiles. I'm not sure if Scrubbing Bubbles should not be used on tile + grout or if the tile work was maybe not properly sealed.