A deeper setting will go deeper into the finger. A shallow setting may not go through enough of the upper layers to reach the blood. So, in a way, deeper setting means more chance of hitting the blood.Not at all stupid. I've tried every setting from halfway to deepest on "my" pricker, and went straight for the deepest on the one I'm borrowing.
My turn for potential stupidity - am I wrong in assuming deeper setting = more blood?