I'm in Denver, so we are pretty dry up here. I have read that any kind of hardened bread can be used as a teething biscuit, so I might just make banana bread without nuts, cut into strips, and harden it in the oven ala biscotti. They have gotten harder over the course of the day, but still not as hard as I think they should be. From what I understand, they should be like bones (hence the name) and inedible unless you want to gum them or dip them in coffee or some other liquid. We gave one to the baby and he loved it-- he gummed it into paste. It didn't break into chunks, just slowly dissolved. It made a horrible mess, though. I think they are supposed to be pretty bland. If a teething baby is eating them, they won't mind the blandness, and someone older will be eating them with coffee, tea or wine. I might try clove, though... clove oil used to be used as a dental pain reliever, so I wonder if something containing clove would do the same thing on a smaller scale for a teething baby.