In my previous posts I described how placing a piece of junk on top of the ground would null out a coin target buried 3 inches ,8inches away from the coin ....Minelab wrote me back saying they are aware of that problem and to reset the Etrac to factory settings..I'm going to reset the Etrac to factory settings and hunt in factory coin mode and see if that helps..They said to contact them back when I have another 20 hours on the machine if the problem persists