I've been using Caig's products for about 25 ears.
They work like magic on electronic connectors of all sorts.
I've rescued all sorts of electronics that had been written off as "hopeless".
Yes, even new & gold contacts have problems. Caig stuff cleans, lubes &
maintains.
My favorites are Deoxit D5 and Deoxit Gold G5 (for gold). I usually take newly
acquire gear apart, connector-wise & treat all contacts.
No, I don't own any of their stock, just a satisfied customer. BTW, they had a
table at Dayton, I was able to chat with their tech rep & stock at up good
prices.
www.caig.com
--John WB0EQ