Try spraying it with WD40 and then tuner cleaner (hurry - I can only find it at Radio Shack and they may be going out of business).Are you talking Rotavecta masthead unit or the more conventional masthead unit projecting forward off masthead with cups on top and vane below? We have Rotavecta with vertical unit, cups on top with a vane built into one cup. RM emailed saying do not service, replace entire kit (of course). Conclusion made is we haven't needed it for the lake sailing we do so let's live without it.
https://www.parts-express.com/cat/cleaners-lubricants/82Try spraying it with WD40 and then tuner cleaner (hurry - I can only find it at Radio Shack and they may be going out of business).
I think Radio Shack sells a private label of DeoxIT. It is pretty good stuff.These guys have the good stuff! Some I think you may need to provide some sort of license to order some of the products though. CAIG is leaps and bounds better than what Radio Shack is likely selling.