I purchased a V1 a little under a year ago. It sits in my car 24/7 and I occasionally use it in different cars. I dropped it once awhile ago but didn't notice any harm. Lately I have noticed it not being as sensitive on k band. I have it set up to auto silence up until like maybe 4 signal strenght but sometimes it mutes the whole time. Any idea what's going on? If you think it needs a tune up how much does that cost?