Hello, looking for some trouble shooting help. I bought this xdovet metal detector (see below) a while back and it has been working just fine, until yesterday. We took it out to a reservoir and we were searching in sand. We always put the settings to find any metal. It beeps when we get close to a large steel object like a picnic table but I threw my keys on the ground and it didn't beep at all but in the past we have found small nails. We put a fresh battery in it, no change. We turned up the sensitivity, no change. It seems like it's not sensing properly but I have no indication as to why. No error messages on the screen. Any thoughts on trouble shooting to fix?
Thanks
