My handle recently did the same and I am a new owner. It appeared to me that a small portion at the end of handle was chipped. Th handled is threaded on my trailer so I screwed back on and its still there 1000miles later. However, it may be wise for us both to purchase a spare as well as get some Loctite and place on the threads then screw down. Recently I purchased a Camco 39062 Dual Flush Pro Holding Tank Rinser with Gate Valve which I suppose may be able to eliminate the need to pull both the grey and black handles?