Thanks for all the responses. Maybe it's something to do with hoops not seating right or sticking to the heads. The birch rack toms (12 and 13, no 10) have suspension mounts that only hang the toms from 2 lugs and it seems those are the ones that start giving me the snare buzz after I get it tuned mostly out. It will start again within a day or two and I'm wondering if those mounts may be the reason they go out so fast. My other 2 sets which are the same sizes on the rack toms have suspension mounts too but they hang them on 4 lugs. Any thoughts on that? I'll look into the other things suggested here tomorrow but the mount thing did cross my mind. Thanks again all.