Sensor Battery Draining too quickly

I have 4 Generation 2 sensors, 3 are on windows, and 1 is on a sliding door. The issue I am having is the battery on the sensor on the sliding door is draining way too quickly. I removed it and tried to reinstall it to the system. Now the app is saying that sensor needs a factory reset. I tried to reset it, I even removed the batteries and reinserted them (they are 2 brand new 2032 type batteries) that i just recently installed in this sensor. I'm at my wits end, please help!