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Having issues with PETG. Is this bed leveling issue, bed dirty issue, wet filament issue, or something else?
(programming.dev)
FWIW 
this post was submitted on 04 Apr 2026
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I just scrub it with rubbing alcohol, works great. Is that not good?
I found alcohol (IPA) wasn't a reliable fix for all failing 1st layer issues. I still use it because it seems to slow down the inevitable and it's quick compared with a trip to the sink.
In my experience you still want to use soap and rinse occasionally. Since you don't typically rinse with alcohol you can just move the oils around. Also depends on what % you use.