Ummm don't know about biozet to be honest - might have too many "things" in it, like whitening stuff - don't want any of that crap in there!

I just use like, Amolin or something like that. You only use half of the recommended dose anyway (so like, I use about a quarter of a lid full for half a load of nappies).

I don't get minky going on other nappies - I do if I put a flat in there, they go a bit fluffy - but you can just pull it off. I've never bothered separating any of mine (mind you, I have two in cloth, so I don't have much spare time!! lol)