I was playing around with my stem and spacers trying to make some reach adjustments and being a bit overzealous I may have forgotten to grease a bolt or two...

Now I'm stuck with the unfortunate situation below. My 4mm allen screw (above the stem cap) is stuck in the thingamajigger below the stem cap, so whenever I turn the allen screw the entire thing turns, thus not allowing me to unscrew and remove the stem cap. It also won't tighten my headset when I drop it in my steerer tube. Help!