Is anyone seeing Z crashes during the auto bed level process? I am finding that if I do not clean the IR sensor every three or so prints it will crash into the bed. It can be nasty since there is another 20mm or so for the bed to travel. I have been working the machine hard, 30+ hour prints and generally it has been working 24/7 since I installed the new upper rods. PETG, and some PCTG. White buildup that I see across all my printers is building up on the IR sensor. Cleaning it with IPA and a q-tip makes it happy again and it will stop the crashing.