The repair man teach me to do so but make sure the surrounding is clear and safe :
1. Unplug the Oven
2. Push down and hold the one-touch door open button
3. Spray very little WD40 or similar lubricant around the edge of the button
4. Release the button and try if you can open the door
5. Repeat 2-3 times when necessary
Lastly, clean up the outside of the oven .
Wong, October 2008
