Hi;- New question: I've heard a good bit about leaving shells out to be cleaned by ants. Sounds both good an thorough. BUT---are there some areas where ants are better cleaners than others? Are there some times of the year when ants clean better than other times? Are there some species of ants that do a better job of cleaning than other ants? Does dropping a bit of other food in the shell mouth help attract ants? QM