Cheese Crackers anyone!!!!
I have several recipes ... I have made them in the oven and in the microwave ... both cooking methods are good, but my preference is the oven ... basically, different cheeses have different turnouts ... depends on what you are looking for. Stuff like the sliced cheese product in plastic wrappers does not do too well. Perhaps that is why you had a problem with the fat free cheese? I don't know, but just a thought.
I have found the secret to it being easy and proper turnout seems to be the use of parchment paper and using small amounts of cheese per "crisp".
I like to use chipolte, pepperjack, parm .... I like to add garlic to mine YUM. I don't do it too often because of the fat, but if there is a day I am craving chips then I will make some.
Here are three basic recipes, close but different ... I have found they all yeild a good result.
http://www.foodnetwork.com/food/recipes/recipe/0,1977,FOOD_9936_29676,00.html
http://www.lowcarb.org/chzcrisp.html
http://lowcarbdiets.about.com/od/snacks/r/cheesecrisps.htm
HTH