I don't understand the idea of putting a clean trap into the contaminated soil at a remake. I've never done this. Now if I move or make a set a distance from the edge of a catch circle I want a clean trap.
As for blood, well I don't know why but I do; I was taught that way. Blood may simply alert critters to danger. The question is can a coyote, for example, distinguish between blood coming from it's own kind during a stage of fear, from that of oh a rabbit? Hard tellin not knowin. For certian large blobs of blood could distract the critter from the trap site /lure. I wonder if any have tried using the blood as an attractor at a remake.