How to Get Rid of Musty Smell in Thrifted Books

A musty thrifted book usually needs drying, airing, and patience more than anything harsh. First check whether the smell is musty, moldy, or just old paper, because active mold and simple stale odor need different handling. If it’s only damp or stale, start with the safest low-risk steps: isolate the book, dry it gently, and use an absorbent nearby, not inside the pages.

What kind of smell are you dealing with?

Before you treat the book, inspect it in good light. Old-paper smell is usually dry, faint, and a little sweet or woody. Musty smell points to humidity or past dampness, and it often seems strongest near the spine, inside the cover, or on the first few pages.

Active mold is different. Look for fuzzy spots, powdery patches, or colored growth on the cover or pages. If the smell is sharp, the pages feel sticky, or you can see colonies, stop and move to the help section below instead of trying to deodorize it at home.

If you’re unsure, treat it as a damp book and start gently. That gives you the safest baseline without making damage worse.

Gather the safest supplies

You do not need much, and the setup should stay simple.

• A dry room with steady air movement
• A clean table or shelf away from direct sun
• Clean paper towels or plain absorbent paper
• A box, storage tub, or large bag that can hold the book without crushing it
• An odor absorber kept near the book, not touching it, such as baking soda in an open container, activated charcoal, or another dry product meant for odor control
• Clean hands, or clean cotton gloves if the book is fragile and you prefer them

Keep liquids, sprays, and cleaners out of the setup. For thrifted books, the safest first move is to remove moisture from the air around them, not to wet the book in any way.

Steps

1. Isolate the book in a dry place away from other books so any odor or mildew doesn’t spread.

2. Open the book gently and check the binding, pages, and cover before you leave it out. If the binding feels weak, open it only partway so you don’t crack the spine.

3. Set the book upright on a dry surface, or slightly fanned open if the paper and binding can handle that. Use a bookend, folded towel, or similar support if needed so you don’t force the cover flat.

4. Leave it in a ventilated spot with dry air, away from a radiator, heater vent, or direct sunlight. If the room itself is damp, move the book to a drier space instead of leaving it where it started.

5. Put the book in a closed container or bag with an odor absorber nearby, not touching the book. The absorber should sit beside it, not on the pages or against the cover. If you’re using baking soda, keep it in its own open container or packet and make sure it can’t spill onto the book.

6. Check the book after a while, then close the container again if the odor is still there. If the smell is weaker but not gone, repeat the cycle: air the book out, then return it to the closed container with the absorber nearby.

7. Handle delicate pages, glued bindings, and warped covers gently throughout. Keep a glued binding only partly open during airing, and let warped covers relax naturally instead of pressing them flat.

8. After drying and airing, smell the first few pages, the spine area, and the inside cover again. Those are the places where odor usually lingers longest. If the smell has clearly improved, keep the book in normal room air for a bit before shelving it again. If the smell returns quickly, the book probably still holds moisture or the storage area is too humid, so repeat the dry-out process or improve the room conditions before shelving it.

What not to do with thrifted books

Avoid perfume, scented sprays, cleaning wipes, or liquid household cleaners. They may cover the odor for a moment, but they can leave their own smell behind and may stain, cockle, or weaken the paper.

Do not sprinkle powders directly into the pages. Fine particles can lodge in the text block and be hard to remove.

Do not seal a damp book in a closed box or plastic bag without an absorber and airflow plan. That traps moisture and can make mold more likely.

Do not freeze the book as a casual odor fix unless you are following a specific conservation method for a particular problem. Freezing is not a general deodorizing shortcut, and using it without a plan can create condensation problems later.

Be especially careful with warped covers, detached pages, and brittle glue. Those are signs to handle the book less, not more.

When to stop and get help

Stop home treatment if you see active mold, if the smell stays strong after repeated drying, or if the book shows major water damage such as wavy pages throughout, stuck leaves, or pages that feel wet or sticky. Those are not good candidates for casual odor removal.

Also stop if the book is rare, valuable, heavily damaged, or sentimental enough that you’d regret a mistake. A paper conservator or a library preservation specialist can judge whether cleaning, drying, or stabilization is appropriate. If you’re deciding between keeping the book as-is or throwing it out, visible mold and heavy contamination are the strongest reasons to avoid handling it further.

If the book only has a light musty smell and no signs of mold, the safest path is still the same: dry it gently, give it clean air, use an absorber nearby, then check whether the smell has actually faded before repeating anything.

Conclusion

When the book stays dry in normal room air and the musty odor is clearly weaker or gone, it’s ready to go back on the shelf. If it still smells damp after a few gentle drying cycles, stop and reassess the book and storage area before you try anything stronger.