Pretty dear. $This is scuba related in terms of gear maintenance:
I was having trouble with corrosion on my Sola lights connectors that charge it. When we were at AKR last year, @WarrenZ recommended a product they use to stop corrosion on satellites. We first tried it a year ago and it made my connectors look brand new; so now we apply to our gear after return home from a trip.
Amazon link:
DeoxIT D-Series D100S Spray
I do love our Sola lights, but the switches and charging ports can definitely have issues.