Instinct 2 barometer

I think there's something wrong with my barometer. 

It's been raining non stop for a couple of days. My other abc watch, a casio, shows a steady pressure drop, when i check online, the pressure is recorded as 1009mb, but my instinct is recording it as 1016mb and shows it as virtually a straight line over the past 24 hours.

It's not the first time I've thought the barometer has been unresponsive,  but it seems to be confirmed now. Any advice or ideas?