What if the SR1 sleep device device doesn’t work for me?
Don’t get discouraged or give up! If you are not responding to the sleep device or not experiencing desired results, you should change the battery. Although we ship each device with a new battery, in rare cases a faulty battery has made it through. Clients have reported that the green light still blinked, so they thought the battery was fine. After changing the battery the device performed as designed, and they achieved the results they were looking for.
You can find the instructions on changing the battery here.