My Fitbit's stair count is out on contol for the past 2 weeks

[s_m_w]

It's always been pretty accurate with my stair count, but for the past two weeks it's been out of control. I had over 140 in one day.... How can I correct it moving forward??

[SilviaFitbit]

A warm welcome to the Community @s_m_w! Your tracker detects floors using an altimeter, which is a sensor that calculates altitude based on atmospheric pressure. Atmospheric pressure decreases with increasing elevation, so the tracker calculates elevation gain based on the reduction in atmospheric pressure. Your tracker registers a floor when it detects continuous motion combined with an elevation gain of 7 to 10 feet. 

Your tracker may give you credit for extra floors for a variety of reasons. Occasionally your tracker may detect pressure changes unrelated to elevation gains, such as a gust of wind, weather change, or opening a door. Exposure to excess moisture can also result in extra floors being counted. This happens if the pathway to the altimeter on the back of your tracker becomes temporarily blocked with sweat or water. We recommend that your tracker be worn loosely during exercise. If you want to remove floors from your account, go to:http://fitbit.link/delete. 

Hope this helps!