All good answers. Now I'll chime in. Since you asked.
When a keg kicks it is rinsed out immediately with hot water from the sink sprayer. A scant Tbs of Oxyclean is tossed in then I hit it with the sprayer until about a quart of water is in. Close keg shake well. Drain and spray completely out, repeat if necessary until all the gunk is gone.
Keep an 11/16 and 7/8 wrench handy and take off the posts. Rinse/Starsan. After the first time they'll easily come off. Usually they come cranked on pretty good and it really isn't necessary to do that.
Meanwhile take the pick-up tube and rinse it out. Draw a length of weed-trimmer string and a scrap of paper towel to swab out the tube. Run a little sanitizer through and replace along with posts.
Sanitize keg and leave upended in sink or bucket for a couple minutes. Clean lid, sanitize. Replace on drained keg. All this takes just a few minutes.
Oxyclean is great on the lines I'm finding out now. I fill an empty keg with a gallon of hot water and a Tbs of Oxyclean and pressure it up. That solution is run through the lines and tap. Then another gallon clean hot water. I was amazed at how quick and effective this is.
I would imagine that taps on the outside of a kegerator would need disassembling and cleaning more often than my cobra-taps- which stay cold all the time.