My cuisinart doesn't suck any air in. I do sometimes manage to not clear the bell, as a result mix in plenty of air bubbles, but none of them show up in my final bar for some reason, may be few stearic spots here and there or bigger air bubbles when I manage to end up with thick pudding batter but none of the tiny ones. What those specks look like to me is the specks I got from the Dead Sea salt (6-7% of oils) in my salt bar. That salt is quite abrasive too, no matter their size. Dunno what to with the 5 pounds I have . I'm thinking that it might be the salt in your recipe as well. Why it's concentrated in one area in one of your soaps, I can't think of a reason.