I've been killing myself trying to figure out an easy way to dry out my PETG filament. (My big printer is in the garage, and the filament absorbs the moisture in the air so quickly that it's almost unusable if left out overnight!) I stumbled on the plans for this dryer on the Taulman site, otherwise I probably wouldn't have trusted that it works.
I'm using a 40W halogen globe, and it stays consistently between 100-105°F. There's room for two spools, and after a good 8 hours in there, my PETG is usable again!
(And it's much easier to build than a toaster oven/SSR/PID controller setup).
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