Usually people think the wakeup tilt sensor is too sensitive. One thing to keep in mind is that the remote must be sitting level to start with. If it is sitting pretty level when it goes dark a slight tilt should wake it up. I've seen people put them in a tilt mount or something so they could see the screen better but then the tilt sensor wont wake it up until you tit it to the level position then back slightly. Remember the tilt sensor is a mercury switch if you leave it tilted and the switch is on when the remote goes dark the remote needs to see the switch go off(level) then back on(tilted).

Just a suggestion, let us know what you find.