How does this work?

I had a few questions about the swap. Two, really: first, can you swap opened product, and second, can you swap non-hair product. The reason is that my skin, which has always been sensitive, has been really, really finicky lately, and I have bought many, many bottle of many things that I only used either once, or a few times, before they irritated or burned my skin. However, they are not things that would burn normal people's skin (I mean, even the AO senstive skin cleanser irritated my skin.) I don't even know for sure that I would try to swap them--so far, my plan has been to find them other homes with family and friends. But I thought I would ask, because I will probably be buying more things that don't work and will need something to do with them (sigh.)

winterwren