This is a super easy fix. Finally got around to fixing mine.
Auto-level HIDs and Eibachs.
Since you've attempted to do it with the screwdriver, I presume you know where the adjustment screw is. Rather than taking your air box out, it's simple enough to jack the car up, remove the driver's side wheel and peel the wheel-well plastic back -- you'll have direct access to the drivers side adjustment screw.
I did mine in my driveway, but you need to make sure you're on a flat surface. I didn't use a screwdriver though. I used a 10mm socket. There were a lot of "turns" to get the headlights to where they needed to be. I can imagine I'd have been there a while trying to use a flathead to turn the adjustment knob's teeth.
1) Park your car 9 feet away from a wall (car needs to be on a level surface)
2) use a measuring tape to see how high the center of your headlights are off the ground. You'll see a little circle target on the lens of the headlight denoting the center. Mine was about 27" off of the ground on each side.
3) From there, go over to the wall with masking tape and the tape measure, and put two nice 10" strips of masking tape horizontal on the wall at the height of your headlights (one for each headlight and in my case, 27" up the wall). These two 10" strips of masking tape is where you need the light cutoff lines to be.
4) Gain access to the adjust screws and turn your lights on and go turn each adjustment screw until your light cutoff is even with the masking tape.
5) You're done. You shouldn't need to adjust it anymore - I've had beautiful lighting at night for quite some time now.
When done correctly with a 10mm socket, a tape measure, and masking tape, you shouldn't have any issues at all.
EDIT: Sorry, I should clarify. You can access the adjustment screw through the wheel-well. You obviously don't want your car jacked up though because you won't be level. Instead, if you decide you want to go this route, just turn the wheel all the way right and peel back the wheel-well that way. Sorry for the confusion