I just bought a Harbor Freight Ultrasonic Cleaner. I watched a few videos on youtube and just cleaned my first 2 batches of handgun brass with very good results. I used warm tap water and added just under a cup of white distilled vinegar, a teaspoon of Dawn dish soap and a teaspoon of salt and stirred it up until salt was dissolved which took seconds. I used the heat mode and ran for the 480 seconds (8 minute cycle) and did this 3 times. I had two cold water rinse baths ready. I put cleaned brass in first rinse and stirred them around then transferred to the 2nd rinse and stirred them around. After that, just shook them free of water and laid them on a towel to dry. They look clean inside and out. Ready to reload. May try the oven drying method.