When I first got my X1C I lubricated the screws then after not much use I got the lubricate lead screws message as other have. I wiped off the grease, then reapplied, all very straight forward.
Next time I had the message I noticed there was some black contamination in the grease particularly evident on the two front lead screws. When I regreased it I made sure to clean all the existing grease off thoroughly to ensure I was starting with clean screws.
I have the black build up again and no idea where its coming from. If I was printing with mostly black filaments I might suspect that that could be the source but that’s not the case, maybe 200g since cleaning the screws, more than 1500g of other colours, plus the inside of the enclosure doesn’t seem to have any particulate fallout so my main concern is that somehow the screws or bearings are wearing prematurely and likely to fail.
Anyone else had this, identified the cause, solutions, or not worried?