Toggle switch cleaning?

BTW, if and when you spray contact cleaner into whatever small openings may be present on the housing of the switch, there may be a temptation to look closely at what you are doing. Keep in mind that some of the spray will splash back from any surfaces it comes in contact with, and into your face and your eyes if they are too close. It may also emerge in a strong stream from any openings that may be present on the switch in addition to the one you are spraying into.

Best regards,
-- Al

Thanks Al. This switch is on my treasured Spectral DMC20 preamp I've had since new. I do use the switch regularly as I'm sensitive to having correct phase in my Spectral/MIT system. I've called Spectral but I think they're on holiday as I reach an after hours message although I'm calling during business hours. Would it be suitable/effective to use just a drop of the Caig ProGold Gp5 that I've used for years for contact cleaning generally?

I suppose it would be reasonable to give that a try, Pete, assuming as I said that there is a way to get it inside the housing of the switch. I'm not completely certain, though, as Caig's D5 is more specifically intended to dissolve corrosion, while the G series is intended mainly as a contact enhancer/conditioner/protectant for contact surfaces that are already mostly corrosion-free.

Best regards,
-- Al

What about a drop of WD-40 instead of Progold ?

If there is corrosion, maybe but WD-40 tends to get gummy and attract dust as it ages. Could be a short term fix w long term consequences. Why not use contact cleaner?