Jody,
I know this reply is late, but here's my recommendation...
If your brushes are sable or ANY natural hair, bugs will eat them up. If you haven't found this out yet, you are lucky. I bought some brushes made of puma (mountain lion) hair (and, no, no mountain lions were killed!) Some of them were eaten by the same moths that eat wool.
I have a brush box I bought years ago form Dick Blick that's made of cedar. It has a sliding top. Cedar repels moths and other bugs due to it's aroma. I suggest you keep them in there after you clean them out. Sable brushes will return to their natural shape after you wet them the next time.
I just bought several sable brushes from Kalish brush in New Jersey. I keep them all in that cedar case.
If the are nylon or synthetic brushes, you don't need to worry about it.
Thanks!
Bill B. put bold text here put italicized text here