I have a inground pool and spa and have the color logic lights. The one in the pool trips the GFI and the one in the spa comes on but blinks and is not working right. I pulled the one from the pool and in worked one time being out of the pool. I put it the water and it still worked. So I put it back in the socket and it stopped working again. I pulled the covers off the GFI and swithes and tighten the wires. Still not working. They are about four years old. Help