Takes a good week or 2 but it works [SEP] This works! Takes a good week or 2 but it works! Like so many others who purchased this, I get this rash on my back seasonally and I don’t like taking an RX or using RX creams. This Is very gentle, does not dry me out, and the lavender scent is actually soothing. Yes, there is a little sulphur smell, it’s the active ingredient, but it’s very subtle and goes away fast, especially if you follow up with another soap afterward. I saw results after a week and my rash is almost completely faded after 2 weeks of using this 1-2 times a day.