Yup, the intake grille on our old exhaust fan used to regularly clog itself. I'm not sure what this gunk is, but I think it's condensed acrylic vapor that was just waiting to glom onto the next thing it touched: http://imgur.com/rGa63qC

I haven't been involved in cleaning the new one, but I understand the critter-screen at the exhaust port has the same thing happening. We don't have a robust PM schedule at our space, but when we do, this should be on it.

I think a prefilter near the cutter would be a good idea, but things might still be pretty hot when they hit it, so such a filter would need to be fiberglass or something. Anyone done this?

-Nate B-

JB Zurn  wrote:
> found the outtake vent to the -outside- of the building (located near the roof), had a grate to prevent vermin entry. The grate was clogged with debris, little bits of paper, etc. Once that was cleaned out, the laser worked well again.
