The key pad of my Maytag microwave oven, mounted over a range top, lost efficiency. Pressing a function several times would no produce any result. The only advice I found on the internet was NOT to use any ammonia based cleaners.
The solution is to keep the keypad scrupulously clean. I use baking soda and polish up with vinegar. Simple, but before lucking on this fix, I was close to trashing this product!
Sarah T
December 2010