If your cheese has become hard and rather unappetizing, wait, don't throw it away. Instead read some of the great ideas below for using cheese that has gone hard.
If you have a bit of cheese that has turned hard and is dried out, grating it down you can use it for a topping on soup, meatloaf and in many other recipes where the cheese will still melt and be useful - tasting great!
If you have a block of cheese that is a bit dried out, soak it in a bowl of buttermilk for about half and hour and it will soften right up.
Grating dried cheese and mixing with raw onions is a great topping on steak sandwiches!