After trying to hammer a nail in it and pulling, using an extra strong glue on the end of the nail and pulling and vacuuming with no success, I finally got mad at it and took my Dremel to it. It was slow going and took a very steady hand as I didn't want it to touch to blue part. I used a drill bit about three toothpicks wide on slow speed. I cleaned the debris out with a damp Qtip and a toothpick to clean the outer rim around the blue part. It was total relief, until I realized I also need a turbine.
Rita, October 2007