Sorry for hashing up old posts, but for those using kegs I'd suggest you make a special tool called "the fakr double ended dongledo":
-2 feet of pressure or beer line
-1 ball lock gas fitting
-1 ball lock liquid fitting
-a couple of hose clamps.
Put a fitting on either end of the 2 foot line. Fill your first keg with a gallon or two of star san solution, cap, and pressurize to 10+ psi. Shake well, let sit a few minutes, then attach the liquid fitting to the out valve, and the gas fitting to the next keg. The pressure from the first keg will push all the solution through to the second keg. (keep the pressure release valve open on the second keg). When the first is empty, you can open and rinse with water. Pressurize the second keg and repeat the instructions.
You can make your star san solution a bit stronger if you'd like, and you can make a couple of gallons of solution last through several keg cleanings in a row.
When you're on your last keg, hook it up to your tap, put a bucket under your tap and open it wide....this will also clean your beer line and tap.
All this without getting your hands wet. Well, except for when you open the kegs and rinse.
Note: pre rinse kegs with water before doing all this.