Bill - I think this biggest mistake / misunderstanding around wet tumbling with stainless steel pins (Dawn Dish soap and Lemishine) is the amount of time required to get cases clean. For most people switching over from vibration dry media there is tendency to fall back on old time habits.,. 2hours, 4 hours, etc. However, with wet tumbling the times are dramatically shortened.
For majority of brass, both pistol and rifle (straight-wall and bottleneck cases), it only takes 30 minutes to clean.
Heavily sooted cases, such as those fired suppressed through AR15, or brass that is coated in mud takes 45 minutes.
If your cases aren’t coming out clean then it is either not enough brass for the size of tumbling container, insufficient volume of water, or too little of both (mostly empty space in canister). You want to fill the canister about 75% full with brass and then cover with water maybe extra 1/2” above top. If the cases still have their primer, specifically bottleneck rifle cases, then it takes a bit more work to get water to completely fill them. It requires some banging and pounding on canister to free the trapped air. Not uncommon to think you have done great job filling with water and freeing trapped air to only find that after a couple of minutes tumbling it sounds like dry metal rubbing… pop the lid open to find no free water because it went into all the rifle cases. If you deprime before tumbling then there is no longer a trapped air issue.