What’s your favorite cleaning method for connections

Electroscope looks a lot like crc to me which I have been using. They make one for electronics that is plastic safe. Haven’t tried deoxit yet but I’ll check it out. My repair guy uses the one that has lubricants in it for switches. Maybe there’s one for contact points too 

Deficit

Isopropanol.

Cheap, mildly toxic rocket fuel. I have used everything over time and this works the best. Drop some onto toilet paper, clean and then breath on and dry with another wedge of the same. Do not use with wet fingers.

Clean well with deoxIT then spray on preservIT. Pretty much the industry standard for recording studios & audio gear. Supposedly cleans & improves conductivity. I use it on my tube pins as well. 

This costs a little less than Deoxit. Make sure when using contact cleaner that it is also a lubricant, 

https://www.amazon.com/CRC-Contact-Cleaner-Protectant-Aerosol/dp/B007I9Y200/ref=sr_1_42?sr=8-42