my mother is getting up in years. I noticed her bathroom needed a little tlc. Some mold, or mildew (not sure which but it was black) was growing in her bath/shower area. I found this online and love the fact it is gelled...virtually no odors. So you spray it on the area needing help. In this case it was the caulk in vertical corners of her shower. It sticks to the sprayed area. I let it sit while I cleaned the rest of the bathroom. I came back after 20 minutes or so, gave the area a scrub and rinse and it looked new and smelled great. no noxious odors that seem to linger for days. says it stays clean for months, so that will be a bonus.