right...  but i'm talking about before you get there - i've always been told (and done) if the tub isn't clean, at least wiped down with diluted bleach or ISO you're at much higher risk for contamination.  Additionally in the video he recommends mixing the grain and sub with your hand, and again states that you don't have to worry about contamination.  Tho he does recommend washing your hand, still.

I'm all for cutting out steps, what's stated in the video is just the exact opposite of what I was taught and what i've seen published and accepted by the masses.