Corny (POSTMIX) kegs are simple to clean because the interior is easily accessible.
Commercial TOOHEYS OR cub beer kegs, while having a higher capacity than Corny kegs, are far more difficult for the amateur brewer to charge, dispense, and clean.
Corny parts are plentiful and readily available from hundreds of sources, even though they can be a bit pricey.
In any case only a few key points need to be kept in mind for proper care.
Complete keg disassembly isn’t really required after every use if you’re dispensing beer that has been well separated from the yeast and your dispense keg is kept in constant use.
Take all the fittings completely off the keg and remove all seals for a thorough washing prior to storage.
Using hot, soapy water and a toothbrush, make sure all the parts are free of any residue, especially on the poppet valves.
Avoid using any abrasives on the stainless steel parts. Definitely do not use steel wool pads, which leave behind corrodible iron particles.
Non-abrasive 3M Scotch pads or a sponge is a must!!!.
Occasionally, it’s also a good idea to clean out the inside of the gas and beverage tubes.
This can be done by pushing a small cotton patch through the tubes using a wooden dowel or by pulling a patch through the tubes by tying a patch to a length of fishing line.
Look through the tubes to ensure the inside surface appears uniformly smooth and shiny.