I keep promising myself that I'm not going to buy another can of WD-40, but the spray is convenient. But I got a big bag of plastic eye droppers from the surplus pile, and they last a long time with fluids such as mineral spirits. Also, truth be told, the overspray from the WD-40 is going somewhere in my garage, and eventually I'll have to clean it up.

I have no serious objections to any of the stuff that's been mentioned, including WD-40, but I'm on a mission to reduce the quantity and variety of fluids in my garage.