Already doing something wrong

Dude's cool new Bumgenius 3.0 diapers came on Monday and he promptly pooped FOUR TIMES to break them in. Problem: despite prewash, wash, and extra rinse, they still smell. Sun? Another round of washing? I'm waiting on a bunch of PFs and covers, so if I need to switch to something without fleece I can do that, but I'd really like to be able to put these to good use.

Help!

Oh, and I've managed to lose two cloth wipes in a day. This is going great!