How do you get the headlamp bulbs out?

I've done this before several times, but after you unplug the bulb, there's the round plastic collar you have to get off to get the bulb out. That always sticks, turns only a little bit for me, maybe 1/8" then stops (in either direction) as though it's locked, but not enough to get off. I know it gets locked in one direction, and loose by turning it the other way, if I only could.

The one I'm working on, is the one near the air filter, so it's harder since you can't get your hand in properly.

Is there a tool I can get into that area and use, without breaking the plastic collar? Once it's out, I'm also wondering if a bit of oil in that area would make it easier to come out next time. The bulbs are made to last a shorter period of time now, especially if you get the new brighter and wider view bulbs.

Thanks,

jeff 1991 300d, 157,000