Recurring Wall Cracks

I had three clients last week from Mokena, New Lenox and Frankfort ask me about wall and ceiling cracks. Why do they occur, is it a structural problem, is it the paint, why do they keep coming back.... These are typical questions home owners ask repeatedly.  My neighbor and a very resourceful handyman use "Goodbye Cracks" (from the makers of "Goof Off") and both of them swear by it. This product was also acknowledged by The Family Handyman Magazine (February 2012 p. 54). I'm told that this product has to used and applied according to directions otherwise, it will not work and you will be disappointed with the results. It's not expensive and worth a try.