Hey dartostunic, welcome to the forum! I'm fairly new to this hobby as well. Sounds like you have a very tough site to detect on. Keep this in mind: the discrimination control on your detector will not eliminate everything. Some items (like beer cans and large pieces of foil) will produce a signal on your detector no matter what. Why? Well, in the case of an aluminum can, you basically have a large hunk of highly conductive metal (which on most Bounty Hunter machines reads as a 25c or $1 on the meter). Your detector loves highly conductive metals, and will often respond to them, regardless of if the object in question is a quarter or a can. Aluminum and/or large pieces of foil also fall into this category. There is one way, however, that might prove helpful in avoiding these targets. Once your detector signals a high tone that might be a can, slowly raise your coil off the ground, continuing to swing the coil. If the target disappears quickly, you likely have a coin. If it continues to sound off a foot or more above the ground, you likely have a can. Since you're just starting out, I'd recommend going out and searching less junky areas first (i.e. parks, schoolyards, your yard, etc.) to get to know your detector and its capabilities. Then, once you know it well, go back to these sights and work through the trash. Yes, you would be able to avoid every piece of trash, but learning your detector will help quite a bit. Sorry about the novelization and HH, abcoin.