My ds has always worn cloth and for his first 15 months never ever had a diaper rash. Now he has one so bad I keep having to buy disposables to clear it up. And they clear it up really fast. But, as soon as I put the cloth dipes back on him it comes back. It doesn't look like a yeast rash- I looked up the pic on Askdrsears.com. Maybe I should try a new detergent? Which one is good now?