AnnVann - yes, quite likely to go crunchy I'm afraid.
update on solving smelly (clean) nappies
I've done some experimenting with a stash I was given that honked very badly and this methid worked best
Soak your clean nappies in white (malt) vinegar and cold water (500ml bottle of vinegar and top up the nappy bucket with water) overnight. Then put the whole lot in the washer, do a prerinse on cold, wash warm (30 or 40C) with a full dose of biological detergent. Rinse two times with warm or cold water to shift the detergent.