One idea from past experiences: If you set up on grass and not on some protective matting or concrete, grass can clog the gnarled knob that rests against the wooden ground board, thus making it slip and even wear into the wooden board. If that is the case, a thick rubber floor mat from a box store will prevent that issue from happening. I do cut a hole to allow the power cord to run under the matting to its plug.
However, there may be other issues that need checking.
Al Lamperti