Ouch, $80 for that valve tool. I guess the kegs are free though. OK, so now I know how to get the thing open, any tips on effective cleaning?
If you didn't want to open the sanke keg you could fill a corny keg with a hot solution of pbw or oxyclean, and use CO2 to push the solution via a transfer hose into the sanke keg, soaking it for sometime. But then you would have to rinse it that way and sanitize it that way. Which requires a lot of disconecting and reconecting of hoses (a lot of work). I don't do it this way beasue I want a complete srub down of the inside.
If you can open the sanke keg up with the sanke keg tool and soak it like you would a corny keg, you can scub the inside of the sanke keg using a carboy brush.
These sanke kegs are useful when you have the tool to take them apart, but if you don't have the tool it can be a pain. I would much rather have a corny keg becasue they are easier to work with. Although, these sanke kegs are great for storing and bulk aging beer.