I found that a £2.19 strap wrench from a cheapo DIY shop was the only thing I could use to get enough purchase on the glass. Its a rubber strap (for grip) on a plastic self tightening handle (for leverage).
Hope that tip helps
Ian, August 2008
I have the same problem. I am going to give Neff a call in the morning unless you managed to find a solution that you can share?
John, May 2008
they can be very tight and you have to turn anticlockwise as you stated.make sure you don't turn the bulb holder round instead of glass cover as this could damage wiring