I have a new cleaning method for my atty's that I've used a few times with pretty good results, gonna give a cliffnotes version..if there's anything wrong let me know but I think it's a great one if you like to step away while letting the cleaning continue on its own.
First thing I do is blow out any excess juice in the atty and rinse both ends quickly. Then I take a small dixie cup, poke a hole in the bottom with some scissors and insert the atty contact through that, so the atty points out of the cup. I then turn on the hot water in my sink and set this under that, the cup acts as a stand and holds the atty under the hot water (thus ending any possible burns, or dropping it if you use tweezers) and let it run for a few minutes.
After that I take it out, put it in another dixie cup with warm water and add some efferdent, which is used as a denture cleaner and let that sit for 15 minutes.
After this, I repeat the first step under the hot water with the cup to remove any excess efferdent and anything it broke up in the atty.
After that, a few minutes with a hair dryer, and isopropyl alcohol to clean the atty contacts and battery contacts, let that dry. Then prime, and go.
It's a lot longer than some cleaning methods, but it has worked well for a few months now on the same atty with as far as I can tell no decrease in performance.