My process is generally...
1. Rinse keg soon after it is kicked
2. Fill 2/3 with hot water and cleanser
3. Shake well
4. Connect gas line and run the cleanser through liquid line while working the tap handle a lot.
5. I usually have several days/weeks before needing that keg again so I...
> Note that the washer on the inside is the one included with the cooler.
I mean the rubber washer is the factory included one. You still need the stainless washer between your brass nipple and the factory rubber washer.
Perhaps review this thread. I followed this thread exactly and after getting everything properly tightened there was no leak. Like you I think I needed 4 washers on the outside, but the inside of mine is exactly as in this thread. I also used the o-ring shown in the following thread on the...