Here's a time-saver for the bikes that just aren't worth a teardown, i.e. the more disposable bikes or where a cottered crankarm is discouraging proper renewal of order in the bb:
You can literally grease a hub or bottom bracket without touching a wrench in most cases, and the tapered tip slips into cable housings and creates somewhat of a seal, for use with whatever spray-cleaner or lube is needed.
I have about 25 different aerosol and squeeze bottles with this kind of applicator since it makes lubing more effective and less messy.
I just spin the tube over a lighter, and draw the heated tubing into a capillary, then cut to length.
You can get two applicator tubes out of one pull, just cut the capillary with a sharp razor or scissors.
One caution, a heavy flow from the spray can may blow the tube out of the nozzle, especially as the capillary is made longer and/or thinner. Different tubings and temperatures can give different sizes and thus flow rates.
A fresh, square cut off of the blunt end of the tube usually restores a tighter fit in the can's nozzle.
My aerosol cans seem to last longer with these tubes attached, that's for sure, but for making hash browns, I just use the fresh stuff right out of the can. ;-)>