Intermittent Connections on Deck Mounted Antenna Connector

I have a mast top antenna on my sail boat, and sail in a salt water environment. The antenna wire connects to a deck mounted connector, and recently I have been getting intermittent reception. I believe the cause is either signal loss through the connection or poor connection. Would one of your products help?

Also, should I use one of your products on my outboard motor's spark plug connections?
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The maintenance program we recommend is as follows:
1. DeoxIT® (to clean the area).
2. DeoxIT® SHIELD (to seal the area); and
If the surface is pitted and corroded:
3. DeoxIT® TYPE M260 grease (#M260Cp) with copper particles, as a final step, for additional protection due to harsh environmental issues inherent in marine applications.
OR
If the surface is pitted and corroded, but a conductive surface is not appropriate:
DeoxIT® TYPE M260 grease (#M260Qp) with quartz particles, as a final step.
OR
If the surface is NOT pitted and corroded:
DeoxIT® TYPE M260 grease (#M260Np) with no particles, as a final step.

NOTE: ALL sources of power, motors, etc., should be turned off.

DeoxIT® may also be used for the spark plug connections, but once again, ALL sources of power, motors, etc., should be turned off.

NOTE:
DeoxIT® GOLD (formerly ProGold)
DeoxIT® SHIELD (formerly PreservIT)
DeoxIT® FaderLube (formerly CaiLube MCL)
DeoxIT® Grease Type M260 & L260 Paste (formerly CaiLube Grease).