diaper washing question- I have a top loader energy efficient washing machine. I am using oxyclean free and charlie's soap to wash them. i do a heavy wash on cold then a heavy washon hot. they come outlooking clean and sort of smelling clean but sort of with an underlying sent of poop. The baby is 13 days old and they did not sort of smell like poop before we started using them, although they are all previously used diapers.