Not trying to be funny,but you are not hunting in tall grass, and have the coil an inch above the surface, or are wearing out your scuff pad? The thing to do, and this is for me as well, since we fall into bad habits, is ask your buddy to keep an eye on your technique, and is what you are doing ,something that could be improved upon...It is too easy to raise the coil as you hunt...Indians do not mean that silver is there, only that the possibility exists for silver to be there..... A 50% loss in depth,from air distance, I think, is a little worse than mild soil...I watch some of the field hunters,( especially English videos) and it amazes me that they actually find anything swinging the coil 4 to 5 inches above the ground...Why do Minelabbers find the deep stuff? They go slow and scrub the ground...Sometimes I think that Tesoro made a mistake making such light machines...We swing them like we are dancing to swan Lake.. Remember, the detector is only ten percent of the equation.Where you go, how you search, etc is the other 90%..Get that in order before you blame the detector..........