One of the most cited cleaners, preservatives for electronics is: Craig DeOxit D5 Cleaning spray 5 oz spray (140 Grams) (used for cleaning and "some protection") Craig DeOxit D100 (to mil spec:NSN-6850-01-435-6478) 2 oz about 57G size Spray (very small can of spray)- expensive For greater protection AFTER cleaning: Craig Deoxit - Gold The above is used on trim pots and other sensitive electronic equipment that have a direct make/break or sliding action in the Military and is used by many Hams for their equipment. Amazon and other on line sites.. Expensive but Great stuff. Rich Wittig M/V Moonshine