I kept my 985 out in the car year-round for the past 3 years. It might just be my imagination but it seems the sensitivity has decreased somewhat over the years.
Is there anything I can do to prolong the effectiveness of the detectors?
The 985 has never given me any problems and the AutoScan filters out a lot of stray X and K band riff-raff. Using Highway mode results in excessive false-alerts though.