Is it the bbh magicalls you're using, or fitted? I know my fitted sometimes have a smell to them, but I've never had my magicalls smell. I boost my magicalls if Emily is going to have a sleep, that way I'll get around 4 hours out of them. I usually boost my fitted with both short & long boosters.

I'm not sure on the napisan question. I would have thought washing in them would do just as much damage as soaking them in it??