Cleaning Potentiometers and Variable Capacitors

CAIG: https://caig.com/
"Kontakt-Chemie": http://www.kontaktchemie.com/KOC/KOCproductsV2.csp
CRC Industries: https://www.crcindustries.com/products/
Although the originally German company "Kontakt-Chemie" now belongs to US-company "CRC Industries", their products are apparently not distributed in the US (or anywhere outside of Europe?).
That is very sad, because "Kontakt-Chemie" is the market-leader in Germany and probably also in Europe and they have a lot of interesting products for electronics. I use more than a dozen products from them.

Видео Cleaning Potentiometers and Variable Capacitors канала KainkaLabs