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Teasing aside, this works surprisingly well. The default settings for dehydrate is 150°F, which is well under the glass transition temperature for PETG.
Would not recommend for ABS/ASA. I have no idea what temperature that plastic starts putting out its toxic fumes at, and I don't want to find out.
Do keep the glass transition temperatures for your filaments in mind. 150°, or even 165°F may be fine for PETG, but PLA will soften at those temps. Also, check your local liquor stores for anything in the 95% range. Makes a great cleaner in general, and should take care of any unforeseen offgassed chemical deposit issues.
Even though I expect any such volatiles to remain a gas and get shot out the exhaust, it's better to be safe.