ADVICE on Cleaning 1970s MARANTZ receivers
i have a marantz 2238B receiver from the late 70s. great condition, but the pots and switches are a bit dirty/scratchy. anybody cleaned one of these older marantz units up before? any advise on what cleaner to use (deoxit/pro gold, contact cleaner, wd-40)? also, how about just a general inside cleaning using low pressure air blow out? or maybe i should just take it to someone that knows what they are doing? i have the owners manual and the service manual, just that i dont know much about electronics. everything works fine, all lights and needles fine, sounds very good, just needs a cleaning after 28 years. thanks for any advise