I really like my Garrett Pro-Pointer. However, I have noticed when I press down against the tip, it signals. I didn't notice this when I first got it. But the past few times I've been detecting, after digging a hole and "probing around" the edges, it signals when I press hard. The first couple times I removed more dirt from that area, thinking it was a coin. But each time it turns out to be a false signal, caused by pressing the tip down into the dirt. I can actually press down on the tip with my finger and it signals. Has anyone else noticed this? Or do I need to have this one serviced? Thanks in advance. HH Randy