Hardware :: Time Capsule Wifi Now Super Slow

I've noticed that in the past few months, Time Capsule has really slowed my wireless connection down a lot. And I mean a lot. Like down to 1.0 Mbs sometimes, slow enough that I can't even watch videos via Hulu because they can't stream fast enough.

Just for background, I'm running FIOS with the Actiontech wireless modem/router hooked to my TC via bridge mode. I have the wireless on the Actiontech off so as not to interfere with the TC, so there's no possible wifi interference. It was great when I first had this setup (20 Mbs up and down), back in Jan. It has been super up until a couple of months ago. At that time I did update to the latest firmware on the TC. But once I noticed the slow down, I reverted back and it's still slow. When I hook the computer directly to the modem, I get the 20 up/down as before. So clearly there is something wrong with the TC. I've already changed channels, but don't know where to go from here.