Just got a little Krups GVX2 burr grinder and trying to remove the burrs to clean but stuck fast. Manual and various You tube videos I have seen look simple enough. Set grinder to fine and a simple twist clockwise and lift out. Mine is stuck fast and I dare not put any more pressure on it. As far as I know recently used. I have wiggled it about, tapped lightly on the top etc to no avail. Anyone had a similar issue or suggestions?