US Cable Support > Bright House Networks > [CFL] After multiple visits from BH, spotty WIFI on Lightning!

Hello! I recently moved to Winter Garden and am having a heck of a time getting BH internet to work. We pay for Lightning and have had over 4 home visits from tech support and numerous phone calls to resolve the following: WIFI in our small one level house is spotty at best. My Xbox and PS3 are no further than 20 feet from the router and I still have buffering and reloading issues (something I never had with Comcast and FIOS in Virginia when the router was on a different level of the house). Techs have come out and replaced the modem twice (I'm on my third modem/router) and checked the signal and box outside. At times, the signal works. At other times, it's as if I'm on dial-up. With Comcast, I was able to add another modem to the house for a work computer, but still use the same internet via coax. BH said if I wanted to do that, I'd have to pay for another Lightning subscription. If BH cannot get the WIFI to reach my entire small house, why can't I add a modem (that I'd pay for) without paying for internet twice. I'm afraid to call them again because I feel like it's a lost cause. Can you help? I had an Aeris modem, then a Ubee, now an Aeris modem. Also, starting this morning, my battery light on the router/modem is blinking. They said this was a new router. How could the battery be dying already?