Quote Originally Posted by nova_robotics View Post
Why not compressed air? Using a liquid seems like an easy way to ruin the drywall.
Compressed air won't get it clean. I trash mine every couple of years and replace them with new ones since I don't trust the liquid either, but compressed air just doesn't work. Mold and/or mildew, dust, dirt, and pet fur/dander, plus the stuff that falls off of humans...

Bill