Hi - we have 2 DS-2CD2332-I cameras which have been working fine circa 2014 and detecting motion/intrusion without needing any changes for many years. In the past 2 weeks or so, the one started to not detect motion/intrusion and then the second one also started having issues but not has bad as the first. The first one is exposed to the late summer sun and then the cold and damp during winter - are the sensors mal-functioning and is it time to get replacements ?