A promising target could be a fake by some means. rust often destroyed when dug, leaving small debris without a metal signal intact. flow (leach) to the surrounding ground, so detectors detect traces but the dig holes are empty. rock Sometimes it sounds like metal, it gives off a false signal, and sometimes, when it's digging, it's the target. re-installed at the bottom of the hole, so you re-explored the same area without finding any metal.

Some common causes:

• Rusted object It could be destroyed when dug up.

• Metal element (leach) to the ground around

• Rock generates metallike sounds

• Target acquired re-installed or missing during the dig