Took the etrac out today started out fine in middle of hunt noticed that when I pinpointed my machine started to make a singsong cracking sound when I got right on top of where the coin was...Found the coin ok but never had that happen before..I did a reset and cleaned under my coil cover and made sure the coil was tight to my machine. Does anyone have any ideas what might be going on??? Did notice sometime back it did make a static kind of noise every once in awhile but never when in pinpoint mode...Any help would be greatly appreciated