I use tea tree oil! My recipe is this: in a small bottle mix 1 cup olive oil with 3 drops tea trea oil. Then, in an old sposie-wipes container, I mix 1 cup water, 1 tbsp. natural baby wash, and 1 tbsp. olive/tea tree oil. Then I put a stack of wipes right into that solution. I've found it easier to have them already wet and on hand than trying to wet them in the sink or with a spray bottle.
As for the tea tree oil, it has three purposes:
1) It's naturally antibacterial, so it keeps yucky germies from multiplying in the wipe solution
2) The antibacterial qualities also seem to help prevent and treat diaper rash
3) It makes the wipe solution smell pretty!
If you use tea tree oil, I highly recommend diluting it BEFORE adding to your wipes -- you want a very very tiny amount. If the concentration is too high, it will burn your baby's sensitive parts. When I was trying to work out the right solution, I would wet a wipe and dab it on my own genitals. If it burned, I cut back on the essential oil.
Oh, as far as wipes go, we have a stack of squares of fleece that were left over from some crafty project of my mom's. I like them because the ends don't fray when you cut them, so you don't need to hem them. Small cotton baby washcloths make far superior wipes, though, if you can get your hands on some.
When I wash my diapers, the wipes just go into the laundry with everything else, then when I hang the diapers up to dry, I just take the wet wipes and put them back into the wipes box. It took me longer than I'd like to admit before it occurred to me that I didn't need to dry the wipes.
