My best tip for anyone using manual level knobs like these is to remove them full and replace the nut inside with a nylon lock nut. It will be a little bit harder to get back on but once it’s on, you’ll be able to turn it normally, albeit with a little more resistance. The lock nuts will allow you to go MUCH longer between leveling the bed. I maybe relevel the bed on my printer 2-3 times a year and it’s only a minor tweak to get it back to level.