DVD will not eject.

Every once in a while my external mac dvd drive will not eject. Sometimes command line "drutil eject" will work, but often it will not. Luckily windows can handle this. So I just have to keep a good old reliable windows box around so I can plug in the drive into windows, then go to devices and hit eject. And boop out comes the dvd. And then I can take the drive back to the mac and it will work find for a while, till it does not. I would like to know what Mac OS can do to provide a better force eject method. It's obviously possible, windows does it.