After spending a few hours wading at a fresh water lake a few days ago my speaker volume has all but vanished. I've got Gain maxed at 30 and Volume Limit maxed at 30 and I've turned off wireless. Still I can only faintly hear my detector speaker if I'm at quietly sitting at home. Even the error beeps when I try to scroll too far in a menu are just barely audible in a quiet indoor setting. Is anyone else experiencing this problem?