I really like the idea of trying the dust mask, but only as a purely diagnostic tool that is. I would shudder to think of the response I would get, (or where that mask might end up for that matter) by my suggesting we took a trip with her wearing one. But serously though, would a simple "nuisance" type dust mask like you would get at Home Desperate for like 3 for 2.00, be adaquate, or might I want to try the more expensive packaged type, like you might use for fiberglass, or peraps even a canister respirator type? If this is an airborne mold or similar thing are we dealing with large, or relativaly small particle matter? Lenny.