[I keep a bottle of ethyl rubbing alcohol handy (you can use isopropyl as well) and spray it into the end of my Perlick faucets.
Please use ethanol, not iso-propyl alcohol. Isopropyl alcohol is oxidized to form acetone by alcohol dehydrogenase in the liver, and you don't really want a lot of acetone circulating around in your blood stream.
In every aspect of brewing it is best to use ethanol. Everclear 151 proof calculates out to 75.5% ethanol, and can be used right out of the bottle for sanitizing all sorts of stuff without any risk of toxicity (unless you drink it. lol ;-).
I keep a Home Depot spray bottle of Everclear 151 in the brew room, and it's useful for all sorts of stuff. A couple of months ago I was kegging a brew and a house fly started buzzing the kegs. So I picked up the only thing I had at hand which was my ethanol spray, and hit him square with a jet mid-flight, and the dumb thing dropped to the floor like a pole axed steer! Ever since then I keep the bottle with me while brewing to cope with the various flies and wasps that like to plague you when you boil wort, and not one has gotten away! The ethanol incapacitates the varmints by wetting their wings, but doesn't actually kill them, so at some point you have to either step on them or spray them again.