You didn't mention if the grout was colored. Be very careful to NOT use any bleach based products on any colored grouts. Something that works good on all types of grout is bon-ami mixed with vinegar. ... read more
You mentioned this room being over a crawl space. We have found that most spaces are incorrectly conditioned.....or should I say say, not conditioned at all. Insulation is typically installed within t ... read more