they must use really cheap silicone, i've powerwashed mine tons of times, and have put alotta pressure near the sensor and mine still works, wierd

 

my 03 baja does it every now and then and i just slip it back on no biggie!!!!

 

i stuck some jb weld on mine when it started doing it, no problems since then. you can also clean the shaft the the **** goes on. mine was kind of hard to pull, thats why my **** keep falling off, so i cleaned everything real well and it started moving free again.