WD40, love it. I use it for so much from cleaning the machines to removing labels on things. Works great when detailing the cars for removing bugs and tar. Heavy packed grease on parts when soaked in WD40 comes clean easily. Yes the only way to buy this stuff is by the gallon and use a cheap spray bottle. My father-in-law always says if it is broke spray WD40 on it, if it hurts spray WD40 on it and if it taste bad spray WD40 on it. I wouldn't do these things but he was a 50 year machinist for Harley and he always used and firmly believes in WD40. Is there something better....good question? I personally know that my tool box, cart or shelf always has WD40 on it but then it is another tool of a whole arsenal you need to have handy.
Ed
Ed