Dielectric grease for 30 amp plug and receptacle?

Dielectric grease, or tune-up grease, is a silicone-based grease that repels moisture and protects electrical connections against corrosion. ... The grease does not conduct electricity, so it shouldn't be applied directly to the mating surfaces (pins and sockets) of an electrical connection.

Since many of the 30 Amp power receptacles in RV Parks are loose and worn out I use a 50 to 30 Amp adapter. I plug in to the 50 Amp receptaacle for a secure and tight connection.