How to Clean a Box Spring

Box springs hide beneath mattresses accumulating years of dust, skin cells, allergens, and occasional spills that seep through from above. Most people never think to clean them until a mattress flip reveals a grimy surprise or unexplained allergies prompt a bedroom deep-clean. A proper box spring cleaning takes less than two hours and dramatically improves bedroom air quality while extending the life of your foundation. The project breaks into three phases: mechanical cleaning to remove debris, spot treatment for stains, and deodorizing to neutralize accumulated odors. Fabric-covered box springs clean up well with standard household tools, while older exposed-wood models need gentler treatment to avoid damaging the muslin fabric stretched across the springs. Either way, the work is straightforward enough for anyone who can strip a bed and operate a vacuum.

1. Strip the bed and expose the box spring. Remove your mattress completely and prop it against a wall in another room or hallway. Clear the box spring of any dust ruffle or bed skirt. Pull the bed frame away from the wall if needed to access all four sides. Open windows in the bedroom for ventilation.
2. Vacuum all surfaces thoroughly. Start with the top surface using your vacuum's upholstery attachment, working in overlapping passes from one end to the other. Flip the box spring onto its side and vacuum each side panel. Finish with the bottom, paying extra attention to the corners where dust accumulates. Use the crevice tool around staples and seams where fabric meets the frame.
3. Inspect for and remove visible debris. Check carefully for cobwebs, dead insects, or trapped items. Use a microfiber cloth wrapped around your hand to wipe down the wooden frame edges. If you spot any tears in the fabric, mark them with painter's tape for later repair — don't pull at loose threads.
4. Spot-clean stains with upholstery cleaner. Spray upholstery cleaner directly onto visible stains and let it sit for the product's recommended time. Blot with a clean white cloth, working from the outside of the stain toward the center. Repeat until the stain lifts. For older stains, use a soft brush to gently work the cleaner into the fabric before blotting.
5. Apply baking soda for deodorizing. Sprinkle a light, even layer of baking soda across the entire top surface and sides of the box spring. Let it sit for at least 30 minutes, or up to 2 hours for strong odors. The baking soda will absorb trapped smells from years of sleeping.
6. Vacuum away the baking soda. Use the upholstery attachment again to thoroughly vacuum up all the baking soda. Go over each section twice to ensure you've removed everything. Empty your vacuum canister or bag afterward — it will be full of the dust the baking soda pulled from the fabric.
7. Address any fabric tears or damage. Small tears can be repaired with fabric glue applied to the underside edges, then pressed together and held with clips until dry. Larger tears may need an iron-on patch cut to size. For exposed-spring models, ensure no staples have come loose and reattach any sagging muslin with a staple gun.
8. Let it air out before reassembly. Leave the box spring exposed to air for at least 2 hours, longer if possible. Keep windows open and run a fan to speed drying of any damp spots from cleaning. Once completely dry, return it to the bed frame, replace the dust ruffle if using one, and return the mattress.