New and confused

I apologize if I am posting this in the wrong place. I recently bough the smarthings package and love the concept but in practice I have been frustrated so far. I have 2 sensors on 2 slider, as of tonight they both no longer recognize open and closing. They show active and inactive at various times. Any suggestions can I set alerts off active/inactive?

Pull the batteries. Also my zigbee sensors have acted a little strange lately.

Pull the batteries
Reset the hub