I went this morning to a park est. 1894 with my tracker iv. I found nothing for 4 hours not even any clad. I tried searching with the dis. off and mode on tone like usual and every 4 inches I had a hit, ton of garbage out their. So i decide to hunt in coin mode, disc. mode and the dis. set at around 3 oclock not one beep for 2 hours of walkin. Finally a beep and it was a full beer can at about 6 inches. Just for fun I toosed a dime in a hole at around 3 inches. I couldnt even detect it unless I was in all metal mode and discretion was off. I had that with the gold digger I had. I am beginning to think something is wrong with my tracker. I hope to have some money soon to upgrade. Love the exercise I am gettin but I would like to not have to dig every pop tab I come across. Thanx for lettin me rant. Enjoy.