I'm with Ezz, I yell out (usually involuntarily!) and put DD straight on the floor, explaining why quickly then leave her for a min or two. I explain again why I put her down when I pick her up and repeat as often as necessary!

I find it has been working really well, as with PinkPalace, DD now bites my clothes rather than my skin (more often than not!)

Good luck, it is not a nice little trick from your DS, and not really nice to save the trick for you!