Got dusty, yellowed, or even moldy books cluttering your shelves? As a book lover who's faced this issue firsthand—some of my own volumes gathered mold in the cellar—a trusted librarian friend shared her go-to method to refresh them safely without damage.
Her secret? A resealable paper bag and baking soda. Here's how it works:

1. Grab a resealable paper bag.
2. Add a tablespoon of baking soda inside.
3. Place your book in the bag and seal it.
4. Let it sit for a week.
5. Remove the book and gently brush off the baking soda with a soft brush.
Your once-dirty book will look renewed, with dust, yellowing, and musty odors gone. This works best on books with cardboard covers or spines—perfect for second-hand finds. It even revives non-washable items like postcards and old newspapers.