If you purchased shredded or crumbled cheese, store it in an airtight container to prevent it from drying out or absorbing ...

Storage is the key to preventing mold on cheese. Hard cheese lasts about three to four weeks after opening. Soft cheese lasts one to two weeks once opened.

Moldy soft cheese should be discarded because mold spreads more easily through it. Editor’s Note: This article also appeared in the January/February 2025 issue of Consumer Reports magazine.