The video is a good start and not bad for the short time from when it was let out that they were working on a cleaning video.
But, I wish it was that easy for me and my salt water / silt crud infected ATX. I talked with Garrett this morning, They are still working on the tight cams. And as of today they do NOT recommend ANY grease, oil, wax etc be put on the shaft.
I personally rinse well in the water salt or fresh, rinse with a gallon or two of fresh water at the car. Move the arm wrest forward, move the round shaft down, pour fresh water into the shaft and hold coil end up to drain the shaft. I then wipe the entire detector down, leave extended as far as possible until I get home. Weather permitting, I use a garden hose to rinse the ATX down again. Then with it at its full length, wipe down and compressor air dry. The next morning I work the cams loose, using compresssed air again to get the fine silt out. Personally I would not recommend holding the control box while freeing the cam locks. I only hold on the the 3 shafts that have the two flat areas when turning the cams. The only thing that holds the totally round shaft in place is the smal anti-rotate pin the is activated by the little lever and a small amount of friction from the arm cuff. Two gallons of water, and a squeeze bottle with a small spout that gives a high pressure rinse at the car do me fine. I have also used rubber strap wrenches to aid is twisting the cam locks.
This is more that I have ever done for any of my other detectors, but the ATX, Armadillo or what ever your pet name is, it is well worth the care he / she / it needs.