Hello I have a 3-way HS210 connected with a traditional flip switch for a staircase. The switch worked fine for over a year. Recently it blinks green with the wifi symbol. I hold the  bottom left button for 15 seconds and nothing happens. I hold the bottom right button and it stops blinking, when I release it starts blinking again. I've held both down and nothing. HOW do I reset the switch to reinstall and get on the network – OR is it dead?

Thanks for any help.