Labelle grease with PTFE
Just a “dab” will work wonders, put a “dab” on the exposed gear box and run a minute or so, then add another “dab” and it will work its way throughout the gear box and worm gear.

Additional Suggested Uses:

• Model Trains: Exposed or Enclosed Gear Boxes (all scales)
• RC Models. Exposed or Enclosed gear boxes on all RC models of all sizes and type.
• Shock Absorbers
• Slot Cars: Exposed or Enclosed gear boxes on Slot Cars of all Sizes
• Bicycles: Enclosed cable rub points, gears.
• Fishing Reel mechanisms
• Other uses: Enclosed gear boxes on all sorts of Household items, squeaky door hinges, Riding toys, mechanical toys of all types.