Dustin alluded to it, but I'll take it a step further on the clay. You will be stretching and folding, stretching and folding, etc., so the contaminants, DS, etc, will become encapsulated in the clay. No need to dry it off or anything. You'll also notice the bar will become larger over time, and that's because of all that stuff now inside. But definitely put it back in the container. If you haven't already, watch Adam's video on the claying process for some tips.
And yes, please post some pics!