My keg washing and sanitizing procedure incorporates a liquid keg connector with attached hose, with a utility sink faucet connector at the other end. Fill with hot water from the faucet which fills from the bottom and thoroughly mixes all PBW. Then after a soak, either dump or transfer to the next keg needing cleaned. The keg>faucet connector lets me quickly and thoroughly rinse PBW from the keg while holding it upside down, with hot water from the faucet. Then kegs are refilled with warm water and Star San or SaniClean, with the keg connector left on. After the keg is full of sanitizer, the faucet end of the keg connector hose is dropped into the sink, which immediately starts a siphon of sanitizer back up through the dip tube, connector and hose. Pick up the end of the hose and lay it across the top of the keg, to the dip tube and entire connector assembly is full of sanitizer. After an appropriate soak, dump, or transfer to the next keg to be sanitized. Sanitized kegs are drained, and filled with CO2 until needed.
I have a keg washer. Yeah it's cool the way it works, but only makes sense to me to set up if I have a bunch of kegs to clean at once. My way is quicker and less involved.