I have had my Cobra xrs 9300 for a few years and it worked normally for the 1st year or so. Then gradually I'd get random safety alerts along with the usual x band alerts. But lately, I get lots of laser, K band, and Ka band alerts all the way to full strength(5) when I KNOW there isn't a cop anywhere near. It still alerts when an actual police car is near, but these ghost alerts are driving me crazy! During a ghost alert, I can turn it off & on, and the alert goes away. Can someone please tell me what is going on?