For what it's worth I purchased one of these inexpensive Ultrasonic Cleaners from Harbor Freight.
2.5 Liter Ultrasonic Cleaner
This model is very similar to the model Hornady sells for over $100.00. I use hot tap water with some dish washing detergent, and run it for 2, 8 minute, (480 second), cycles. The cases come out spotless both inside and out. If you resize and deprime first it will also clean the primer pocket and remove the case lube as well. This process does not polish the cases to a high luster, but it will clean them spotlessly.
After I remove them from the Ultrasonic Cleaner I then rinse them in hot tap water, then set them outside on the patio in the Sun to dry. I then toss them into my Dillon FL-2000 Vibratory Case Cleaner with ground corn cob and some Dillon Rapid Polish for about 4 or 5 hours and they come out cleaner and shinier than new brass. These Ultrasonic Cleaners have become cheap enough to incorporate into the reloading cycle. If you do get one, sign up to Harbor Freight's mailing list first. They send out printable 20% off coupons almost weekly. Bill T.