Must be replaced over and over again

I have to confess, we have our weather station a few years. But after all, this is the 3rd external sensor for this. Some time I had him lie umter the carport roof. That was probably the best place, because he has kept safe 2-3 years. But there also was really not a drop of water. Now he was a couple of weeks not as well protected and already it's broken. This is really annoying. I could first not believe after I but is now trying for days to get him with all kinds of batteries and tricks running again (at first thought the station just receives the signal not) I give up and buy, again, new ,