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At our lab I use Miller-Stephenson MS-725 or MS-755. The 755 has the advantage of working on greases, organic flux, and ionic salts. Because of the concern of ozone depleting chemicals, the best performing products are no longer available.
I design and build detectors for Nuclear Physics type experiments. They are extremely sensitive to certain contaminants so cleaning is very important to us.
If there are no ionic salts to deal with, I find brake cleaner works quite well since it's mostly trichloroethylene. However, just as with lacquer thinner you need to be careful what you get it on. Also, it's a cumulative liver toxin and suspected carcinogen. Use it in a well ventilated area with splash goggles and gloves.
The MS-xxx products are a bit safer but one should still exercise caution.
Oh, and there are the vintage radio people that put the whole chassis in a dishwasher. I haven't gotten up the nerve to try this yet. Perhaps if I ever find a set that's been in a flood I will.
John Y.
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