I took my Deere headlight bulbs out from the 80 and put them in the Camry. When doing so, I see water got in the plug that goes into the bulb. THere is corrosion in the plug. Its not bad yet but it needs to be cleaned (if possible) or replaced. Is there a way to replace the end? When I installed the harness, I thought it was not a tight seal but the rubber looked like it would seal BUT it didn't. Should I/ Can I put dielectric grease on the plugs to keep water out?