to put vanilla extract in a bowl and nuke it for at least 30 seconds. Leave the door closed for 12 hours, remove vanilla, and wipe down the inside of the microwave.

Of course, the same book lists the lemon juice trick you already tried. The vanilla extract thing is supposed to work for the stubborn smells.

Can't say I've tried this, but if you do, let me know how it works.

BTW, tip is from Talking Dirty with the Queen of Clean by Linda Cobb.

Leanne