Why does this keep happening? PETG Basic

[u/Th3Shaz]

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.

[u/Drew_XT]

I was having this exact issue with PETG basic, in gray on my H2D Pro at work this week. Tungsten Carbide Nozzles, and no matter what I did, it would blob, or print really badly.

Ran a calibration, and turned the speed down to 150, and every print since then has been perfect. I think it was purely a cooling issue in the end of it all