I repair electronics part-time, and Deoxit is an irreplaceable part of my kit. On my Benley, the headlight switch was iffy as heck, failing to switch to high beam about 60% of the time. A cleaning with deoxit and toggling the switch later, it now works perfect.
Deoxit works nicer than most cleaners because it leaves a mild lubricant (helpful for volume controls) and the residue helps keep the contact area clean.
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