Q: The grout on my 2-year-old bathroom tile is giving off a white, powdery, film-like substance. I let the shower dry for a number of days and then used sealant on the grout, but the problem persists.
Any idea of what is going on and what I should do about it?
A: Unfortunately, we have a pretty good idea of what's going on. You can apply all the sealer in the world, but it won't help. The problem lies with the grout itself. The grout was either the wrong type or it was improperly mixed when it was applied, or both. more...