I have a 2009 Prius with NON HID headlights. The left one appears to not adjust properly. If I remove the bulb boot, the light bounces up and down (the part that is supposed to adjust). When I turn the adjuster, it will wiggle down then up again, like it is not engaging the screw inside... Also, when I hit a bump, the left beam bounces. The main housing is secure, just the inner (adjustable) one is not. Any ideas short of replacing the whole thing?