It will go slightly deaper in low trash,but sweep the coil very slow say 2 /3 seconds each way.
Start off in auto sense,it is much more stable,less false signals,but to achieve best depth manual sense as high as you can without false signals becoming a problem,you may get the odd pop & chirp depending on the ground.
Make sure to go through the noise cancel procedure say every half hour or more,make sure there is no iron or targets under the coil when doing this.
Also consider hunting in all metal,no discrimination,and just ignore the iron and dig the good signals.
If you cross save a conductivity patern with no discrimination along side your all metals programme,you can check iron sounding signals with this conduct programme,if you get a minus reading with a high tone it's iron,if you get a low tone/growl it will be deep or small non ferous.
