water always gets in, given enough timeSpun the back out of my cheap height sensor that failed. The reason for failure was water ingress. The OEM part has 2 O rings on the shaft. The cheapo has a very nice brass (bronze?) bearing for the shaft but no O rings on the shaft itself, just one rather poor fitting one on a plastic boss at the end of the shaft. I think the second one has failed now so time to buy a proper one.