I live in a ranch style house which is shaped like a horseshoe. At the very end of one end of the house (one end of the horseshoe), I have an airport extreme connected to the network via Ethernet. At the end of the L just before the house makes a turn to the other end of the horseshoe, I have an airport express plugged into the wall which is extending my network. Unfortunately, I lose the WIFI about 1/3 of the way down the hallway on the other end of the house. What is the best way to extend the signal to the other end of the house? Thanks for your help in advance.