A simple and cheap way to stop this problem..clean the effected area, apply a thin film of "Calsium Starite" a polimer based grease.(clear lithium will work too) These soap based greases resist water and will stay put forever ! clean around the area after re-assemble with MEK or 111 tricloro.

Find a DuBois Chemical or Johnson-Diversey rep in your area..he or she will be happy to give you a small sample (-1oz.)if that fails, I will mail you some myself..