I recently purchased an Explorer II with a 15 WOT. I have no problem in dry sand but when I go to the wet sand it faulses constantly. I tried factory setting, I tried setting channel manually to 1. No cell phone is on (I do net even own a cell phone). I took the coil cover off. All of the wires and connections look good. The coil looks almost new. If I turn the sens down to 3 it stops faulsing but the depth is only about 2 inches. I have an Excalibur that works great (on the same beach). I tried 3 different beaches about 40 miles apart. Any ideas?