I would check about it's toxicity if it has any before using it. A good cleaner is white vinegar and baking soda. Both are very cheap. Take your atty and pack the end with the baking soda. Hold it over a shot glass of something small. Pour the vinegar into it slowly and let the foaming action do it's work. This also helps rid of burnt tastes. Let it sit in the solution for 20 minutes. Rinse in hot water. Now drip a couple drops of lemon
juice into it and let it sit for another 20 minutes. The lemon acid will help remove any leftover gunk and tastes including the vinegar taste. Rinse in hot water again and stand it upside down (battery
threads up) for 24 hours to dry. Prime with your favorite
juice with about 7 drops and let sit for a few minutes. Screw it on and have at it. This procedure has helped me and many others to rid atomizers of a burnt taste. Atty users know exactly what I'm talking about. Atty's come out pretty clean also.
Another option is an ultrasonic jewelry cleaner with a 50/50 mix of water and vodka/pure grain alcohol. Run them through 3 x 3 minute cycles. Rinse in hot water and let dry like above.