I'll try to give you a run down mark.
1) I knock out the primers with a lee universal decapping die.
2) I will put 50-80 deprimed 308win cases into the thumlers with 5 lbs of stainless media. The media stays in the tumbler, so I just dump the brass in.
3) Then I put 1 gallon of hot water right out of the tap in the tumbler.
4) I put in 2 teaspoons of Ivory dish soap.
5) I put in 1 9mm case of lemishine. (this isn't needed if you have a good water softener)
6) Screw the lid on the tumbler, put on the tumbler, and start it up.
7) After 1-2 hours, stop tumbler and remove lid.
8) Dump nasty soot filled water down the drain. Be careful to not let your brass or stainless media run away. Then fill the tumbler back up right there at the sink, and swish the brass and media around to wash it a bit. Then dump it out again.
9) Fill the tumbler about 3/4 of the way with hot/warm water. Then fill a small bucket or something with hot/warm water as well.
10) Get comfortable, and pull each individual piece of brass out of the stainless media, washing as much of it out in the tumbler as you can. Then do a secondary rinse in the other bucket of water. Be sure to get all the pins out and ensure none are stuck in the primer pocket. This is pretty simple. Just dunk the case upside down a couple times in the tumbler then again in the bucket.
11) Toss the brass onto a towel. Repeat.
12) Once all your brass is out of the tumbler and onto the towel. Close the towel around it and "tumble" it back and forth to get excess water off.
13) Lay a separate towel on the floor and spread the brass around on it. Aim a fan at it and let it dry overnight.
14) Enjoy the cleanest brass you've ever had.