Down a rabbit hole to figure out grease is bad for belts

Bambu Lab P Series General Discussions
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So, yesterday I went to start a print and my P1P failed because it could not home the Z. Did this twice in a row. Turn the printer over and clean out the bottom and even though there was some debris nothing under the lead screws. Turned it back on and started the print and it got past the level process and just as it went to lay down the purge line, the nozzle scrapped all plate near the end of the purge line. I heard it and stopped it immediately.
DAMN!
So what I did notice when I turned the printer over is tons of black grease that I use on the screws. KEZE Silicone PTFE which I read someone where that this was great for 3d printers. after closer inspection there was grease all over the belt and the wheels.
Took it apart and used hot soapy water to clean the belt and used WD40 along with soap and water and finished up with IPA. Put it all back together and it seems to be running like a charm.

I am afraid to turn my other 3 P1S over to look to see if this grease is under there. I have been using it for a year now. Is KEZE Silicone Grease with PTFE a good grease to use?

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“Good for” is a bit of an unhelpful framing.

These are interference belts, they don’t rely on friction to operate, but rather the actual tooth engagement with the toothed wheels.

The other dimension is chemical interaction between the grease components and the belts - there is no simple answer, but at the worst, some greases could be harmful to belt materials, so on balance, I’d say there’s no upside and potentially significant downsides, so I would avoid it.

Now, neither of these things explain why your machine is running better now, it could easily be that cleaning it removed some junk from pulleys or the belts.

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I see, makes sense. Maybe the belts were just a little loose and me taking them off and putting them back on put the correct tension on them. Not sure. It is working and have not had an issue with 3 prints so far.
Thanks for the info, greatly appreciated.

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