Cheese tip

I hate spoiled food!  It's expensive enough, right?  I never use a whole block of cheese, then remember to use it and it's growing green.  I've started grating the extra, like mozzarella or cheddar cheese, spreading  it on a cookie sheet, and pop it in the freezer,  Once it's frozen, scrape it into a zip lock or container, and use it just like fresh cheese when cooking.  Another way to keep it fresh is to take it out of the plastic wrap, re-wrap it with a piece of damp cheese cloth with a little vinegar  squeezed out.  The acetic acid inhibits mold growth, and the damp texture keep it soft and fresh.
I also used my dehydrator once...... I thought making cheddar dry sprinkle cheese would be a fancy alternative to Parmesan, what a lot of work for very little bang.  Do you have any good ideas what to do to keep it fresh.