I purchased a refurb RX-65 off of Belscorts eBay page a few months ago. Lately I'll be sitting in traffic or even driving down a road by myself and I'll get a full K alert and it will dissipate within five or so seconds. Is this what is considered a false reading? I thought those were just little blips, not full blown alert like someone is aiming a radar gun directly at my RD. Could anyone clarify what exactly is going on with my RD?