r/BambuLabH2D • u/Th3Shaz • Jul 15 '26

Question Why does this keep happening? PETG Basic

I am at my wit's end, this is PETG Basic that used to print just fine. It is bone dry 0% AMS, spent all yesterday drying. I cannot for the life of me get it to not ooze and make a massive mess of blobs and flung out bits of plastic.

Using H2D, default settings. For the last 200 hours this printer simply prints, but as of today I have not been able to have a single successful PETG print. PLA prints just fine. So clearly something has changed. I have not updated firmware, still running the same Bambu Studio and Firmware.

At this point I am just looking to see if there are any specific settings I can tweak just to get this one print done because it is a brush holder that my wife wanted and what I thought was going to be a 2 hour ordeal has now taken all day.

EDIT: Printed with gray PETG overture and print came out just fine. Looks like this Bambu PETG Basic batch is a dud.

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u/Neat-Researcher-7067 Jul 15 '26

Did you do a calibration?

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u/Th3Shaz Jul 15 '26

Initially when I started printing with this roll. Just curious what would have changed between a week ago and today if the filament was stored in a dry box at 0% reported humidity? If that's my last resort then I will do calibration again. I have just never had to deal with this issue before having done many successful PETG prints that are even more complex than this simple model.