J1 emits a potent smell while printing (any materials), anyone else notice this problem?

It’s been a long time since I have used the J1 up until recently and started to play around with getting it working again, which it seems to be doing (more or less) now with some some software fixes that previously didn’t exist.

However, with my ability to print for a bit longer each time now, I am noticing a very strong odor when printing even basic materials, but more so on materials that are requiring no fans and higher temperatures for extrusion. These same materials do not have an issue on my other printers, so I do not believe they are the culprit.

The only thing I can think of would be the grease I added to the printer when I got it over a year ago because it lacked proper lubrication, but I imagined I would smell that regardless of if the machine would be printing or not. It does not seem to smell at all when not in use.

Have any of you noticed bad smells coming from the printer and if so, what were you able to pinpoint it as?