Fun with electrical contact cleaner! Please let this be "our little secret"!

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Please don't tell anybody this. Let it be our little secret, to quote the great Scarr, from Lion King: A lot of stereo (and mono) components from the late 1960s and early 1970s, including the Sherwood S-7100A receiver, Marantz 2215 receiver, KLH Model 21 radio, and Fisher X-100B tube integrated amplifier, do not need expensive repair when you rescue them from that dingy basement or garage. Grandpa's spirit wants you to rescue them in an easy-peasy way . Many of them have a dead channel, or scratchy controls, or crunchy input jacks, simply because nobody has bothered to give their electrical contacts a good cleaning in 50 years. If you score some Electrical Contact Cleaner from your local Home Depot or Ace Hardware, you can give all of the controls, including knobs, switches and buttons, a quick bath with the stuff. Work them left and right, or up and down, or in and out (no, it is not quite as good as good sex, but it's close) and then see what happens! It even seems to work on the tuning mechanisms (move the tuning knob back and forth and see what moves) inside the case! Don't be afraid to give baths inside the case of these venerable old components. No water allowed, though. I just gave a bath to my 1971 Kenwood KR-5150 stereo receiver, and it sounds great in my main system. I then gave one to one of my KLH Model 21 radios. Same thing. Don't let the electronics repair people charge you $100 for what you can do for way less than the $10/can the stuff costs. Whee! Remember you read it on MyLot! I'll attach a photo of a late 1960s KLH Model 21 radio I restored a few years ago if I can find it. I'm going to order some sushi first.