I've got a stash of nappies ready for my first baby, mix of new and (mostly) second hand. Now obviously the new ones (only about 4) need to be washed 2 or 3 times.. (can someone tell me which is it, 2 or 3??). But of the used ones, which presumably I really only need to wash once so I know they're clean, two bamboo ones are really crunchy. I've heard vinegar in the fabric cond. drawer should sort this out. Would it be okay to bung these in with the rest of the nappies, even though the others don't need the vinegar treatment? And do I use soap aswell or just vinegar for this softening effect?