Last night, I was getting ready to sand some plywood in the garage for a little renovation project. So, I got out my power sander, some sanding discs and my safety equipment (minus my glasses...) seen here:
Now, keep in mind that the last time I used this equipment was while cleaning up the shop at the school where I teach last weekend. I was using the dust mask and hearing protection as I ran the shop vacuum to get into corners and crevices. When I picked up my mask, I thought, "Ewww...".
Here is a close-up of the mask's filter - it should be bright white:
Time for a new clean one. Boy - am I glad that wasn't in my nose and lungs!