My 5in1 sensor eats through batterys in two weeks. They said to do a hard reset. I did it twice. No change. I have noticed other people having the same problem. This seems to be poor manufacacturing or a cheap made product. This was a gift and it must have sat on a store shelf since 2014. I have only had this thing for 8 months. They cant help on repair because of age. and the fact i cant trace the purchase slip being a gift. They say that the sensor needs to be replaced. No way will I purchase a new sensor and take a chance on it being junk as this one. I will look into a different brand as i have really liked the idea of being able to see the outside readings. Acurite do something about your defect or you wont stay in buisness very long. somebody asked me about it the other day. I told them they should go with another brand as well. word gets around.