How do you get powder spills out of the carpet on your bench?
Do you let the One Shot dry first when it is not new brass? If not, have you had any stuck cases? Check out my post (or the hundreds of others on the Interwebs) about homemade case lube. I personally think it works better, BUT it has to be removed which is a pain in the butt.
If you like clean brass, save up for a wet tumbler. It really is awesome, but lots of work.
I use a small hand held vacuum if I spill any powder. As for the One Shot, I have never let it dry before sizing. After sizing and tumbling, there is very little if any residue left on the case. I have used some homemade case lube in the past but, like you say, it is a pain to remove.