Apply a fast spray of the electrical contact cleaner to remove any dry mud or corrosion. Use vinegar to wash the pins if contact cleaner just isn’t available. Is it any marvel isopropyl alcohol can be found in all corners of digital PCB meeting, rework and restore operations? It is efficient, reasonably priced, and safe if handled properly. To buy isopropyl alcohol in the grade and packaging that is greatest for your software, go to Personal safety equipment – isopropyl alcohol tends to defatten the pores and skin, which implies it attracts out the protective oils from the skin and can result in dermatitis if improperly dealt with.
If so you’ll have to meet very specific country-by-country requirements. At 100V it’s above all definitions of a ‘protected’ circuit, but 100v at 1uA is generally innocent. If you need to be save your best guess is use cleaning with a last rinse cleansing step the place you monitor the ionic focus. If you are fine with restricted lifetime and aim for low cost go for no clean + coating.