Here's how I clean my brass:
Load the vibrator with brass (with primer) and media (I buy bags of corn cob media at the pet store. They sell it as bird cage litter)
Add one laundry dryer sheet, cut in 1" strips
Add about 1" squeeze of Flitz (tube type)
Add about 1" ball of Never-Dull wadding, pulled into small pieces
In the photo below, the 45 ACP brass on the left was tumbled about one hour using the above method. I didn't cherry pick a case, but just picked out one at random. The case on the right was tumbled by another shooter using the same vibrator, corn cob media (probably from Midway) and a reloading polish additive.