Started having problems. Was out detecting today and the detector keep falsing. I then noticed that if I bumped the coil,hit the shaft,patted the control head or slighty shook it it falsed. Checked the coil(even tried another) and nothing changed it.Checked my digging buddy's 70 and it didn't false while doing any of these things. Anyone ran into this before? Also our detectors are set the same. Thanks all and HH