That's the smell of super clean, non funky diapers. Horray!!!! They're finally back to being nice! My son's nappy did not smell of ammonia this morning. I'm sooo glad! The trick... I put some vinegar in the pre rinse cycle. It is an acid and neutralizes the base that is ammonia. This makes it able to be washed out with the soap and water. Also, I increased the amount of soap in the wash. I then dried in the dryer till almost dry and finished out on the line in the sun. This made them soft and fluffy and sun bleached. My son's bum thanks me.