Over the past few days my contact sensors have been randomly dropping off. I have 10 sensors and half of them have done this. None are beyond the range stated they should work, the furthest is about 40 feet with one wall in the way. Battery level is 100 percent. System is only 1 month old. Tapping the button on the sensor reconnects most times, but sometimes I have to hold the button down for 5 seconds to reconnect.
Any ideas?