What the heck are negative ions? Have you ever noticed that some people just can’t seem to get anything to work? My wife seems to have them when it comes to electronic devices. I use the garage door opener all the time, it works flawlessly. She uses it and the door goes into some kind of spasmodic mode where it goes up and down endlessly. It will do every function except close. She turned on the microwave the other day and now all the display says is F9. A quick call to Sears revealed that F9... Sign in to see full entry.