Circuit Board Hint

After building circuit boards from artwork or kits, it’s a good idea to clean all the rosin from the board. This makes it easier to see bad connections and shorts, and also gives a cleaner appearance. You may have been using acetone ; while it does work very well, it has some definite drawbacks. It is highly flammable, its vapors are smelly (not to mention toxic), and it attacks many plastics ‘especially styrene and blends like ABS which contain it).