For serious reloading enthusiasts, the Hornady Hot Tub Sonic Cleaner is ranked as being the best. This cleaner is capable of removing dirt and grime from an upper receiver after firing. The cleaner comes with four transducers, has a user-friendly display and keyboard, uses the Degas function, and includes a drain valve and tube. Also as part of this cleaner is a 1.7-quart inner tank, a small parts basket, drain pans that are integrated into the lid, and five separate temperature settings, from 100 to 140 degrees Fahrenheit. Getting foul from cases has never been easier and more effective.