i would use a waterproof grease. Dont think its a big deal , but back in the day cars were driven, daily and in the salt. So just to help when you replaced the bulb so you could re- align
1969 Dodge Coronet R/T Convertible 1979 LiL Red x2 2012 Yellow Jacket 2006 mega cab 1977 Trailduster 1979 Trailduster