Well, might be the Cisco/Linksys wifi strength is too strong ...
http://www.ebay.com/itm/Linksys-E2500-Refurbished-WiFi-Wireless-Router-N600-Dual-Band-802-11n-/290878808417?pt=COMP_EN_Routers&hash=item43b9ba6161
only $30.
http://www.ebay.com/itm/Linksys-E2500-Advanced-Dual-Band-N-Router-/350771802533?pt=COMP_EN_Routers&hash=item51aba0f1a5