Did you find a way to continue using it, and use an additive that resolved the rashes (regular stripping, turning up hot water heater, etc), or did you have to cease using it?
I currently already do a cold rinse, hot wash, extra rinse with vinegar at the end. I've been throwing in some Dawn the last few washes, but it doesn't seem to do much. If DD spends all her time in cloth, she gets blisters that take a while to heal. Sposies, she has nothing and pretty clear skin. The blisters stop persisting right away and start healing. Her dipes do smell some like ammonia too.