Quick one for livejournal genie

What is the proper way to take care of/clean a real partile/mold/asbestos mask, you know, the one with doublt cartridges that looks like Darth Veder x 2. I just got a real one and took it to Asbestostown last Saturday. (Before I had just used disposable particle masks or nothing at all and didn't have to worry about it). I just left it on the back seat of my car after the outing and forgot about it until today. Uh, should I have washed it or something? Should I do tha tnow?