Just after a bit of advice, I was out around tarnagulla using a gox5000 with a commander mono coil, I'm new to this so not sure if this should happen but even when I lightly brushed the coil over the surface it would sound off like a faint target, sometimes even if I flicked a couple of thin bits of grass or plant, I kept ground balancing but it didn't seem to make a difference, I had the machine all in factory preset, it was happening mainly when the middle of the coil touched something, any advice would be great