I have read reasons for losing a target, breaking the halo effect, etc., but let me run this by y'all. On an old ballfield a while back I had dug many pop bottle tops and a little clad. Hit a good signal at 6", dug my plug plus a few handfulls and placed on the drop cloyh. Check the hole with the coil (no pinpointer yet) no signal. Chek the dropcloth, ding ding. Pick up the loose soil a pass under the coil, nothing. Check the plug, nothing. Recheck the hole nothing. Pull the loose soil from the hole and put on the dropcloth, nothing. Look into the hole and there sits a shiny 63 Rosie. Why wouldn't the coil read it as I passed it under it or was barely covered as I evidently place the dime back in the hole. Last time at the ballfield Another 6" signal. Same procedure same results except I carefully sifted each handful as it went back into the hole and I never found squat. Yes I checked probably a 3 ft. area all around in case the target got flipped out. Any ideas or suggestions appreciated. Now I have to wonder what it is I may have lost.