While printing the print bed permanently shifts closer to the front anywhere between 1mm to 1cm. Just now I cancelled a print that ended up laying filament behind the print in tangled messes. The 3m of wasted proprietary (and mildly overpriced) filament has spurred me into action.

The print bed slides easily when I move it with my hand, so there’s nothing stuck in the two grooves, as far as I know. Anything else I should look out for? Any suggestions on how to fix this problem?

I’ve already had to fix one thing on it, so I’m not maintenance-shy, and I’ve already gone through about 950m of filament, so I don’t know if it’s near the end of its lifespan and in need of replacing instead.