Hey guys hoping to get some imput as Tesoro is closed. I just received this unit in the mail yesterday & it falses really bad in all-metal mode when shaken even the slightest bit. This is with a brand new Energizer 9v, it does the same with the Panasonic Tesoro sent. I am pretty far away from my house & all power lines in the video. Do you guys think this is a sensitivity issue or possibly a faulty coil/unit? Again this is brand new. Kinda sucks if I'm gonna have to pay to mail in a brand new unit. Thanks for any help or advice you can give.