How to Remove Pet Vomit from Mattress

Pet vomit on a mattress is one of the more challenging cleaning situations — the liquid soaks quickly into the foam beneath the surface, and if not treated properly, the odor can linger for weeks. Here's how to remove it completely, including the smell.

Act Immediately

Fresh vomit is far easier to remove than dried vomit. Strip the bedding immediately and start treating the mattress as soon as possible. Every minute the liquid soaks deeper into the foam.

Step-by-Step: How to Remove Pet Vomit from Mattress

Step 1: Strip the Bed and Remove Solid Material

Remove all bedding immediately and put it in the wash. Put on disposable gloves and use a spoon or dull knife to scoop up any solid vomit material. Work from the outside inward. Dispose of waste in a sealed bag.

Step 2: Blot Up Liquid

Press a thick layer of paper towels firmly onto the wet mattress surface. Apply body weight if needed to maximize absorption. Replace with fresh towels and repeat until no more liquid transfers. Never rub.

Step 3: Apply Enzyme Cleaner

Spray enzyme cleaner generously over the entire affected area. Apply enough to penetrate into the foam — but avoid over-saturating, as a soaking wet mattress takes very long to dry and can develop mold. Allow to sit for 10–15 minutes.

👉 Recommended: Rocco & Roxie Stain & Strong Odor Eliminator, 1-Gallon — enzyme formula that breaks down vomit proteins in mattress foam.

👉 For strong odor: Rocco & Roxie Extreme Stain & Odor Eliminator

Step 4: Blot Again

Blot the enzyme cleaner and loosened residue with a clean white cloth. Press firmly and work from the outside of the stain inward. Place a dry towel over the area and press to draw moisture up from the foam beneath.

Step 5: Cold Water Rinse

Lightly mist the area with cold water to rinse out the enzyme cleaner. Blot dry immediately with a clean cloth. Avoid using too much water — excess moisture in a mattress is difficult to dry and can cause mold.

Step 6: Baking Soda Treatment

Sprinkle a generous layer of baking soda over the entire treated area. Leave for at least 8 hours — overnight is ideal. The baking soda draws remaining moisture and odor out of the foam as it dries. Vacuum thoroughly to remove.

👉 Recommended: Nutricost Pantry Baking Soda, 1 LB

Step 7: Dry Completely

Allow the mattress to dry completely before remaking the bed. Use a fan directed at the treated area, or move the mattress to a well-ventilated space. A damp mattress covered too soon can develop mold and mildew.

Washing the Bedding

Wash all affected bedding on the hottest cycle safe for the fabric. Add white vinegar to the rinse cycle to neutralize vomit odor from sheets and pillowcases.

Protect the Mattress Going Forward

A waterproof mattress protector is the single best investment after any mattress accident. It creates a barrier that prevents future accidents from reaching the mattress, is machine washable, and adds no noticeable change to sleeping comfort.

👉 Recommended: PlushDeluxe Premium Bamboo Mattress Protector — waterproof, breathable, noiseless, machine washable.

What to Avoid

Don't use hot water — heat sets protein stains permanently into mattress fabric.
Don't over-saturate — excess moisture causes mold in mattress foam.
Don't use a hair dryer or heat source to speed drying — use a fan and air circulation instead.
Don't remake the bed until the mattress is completely dry.

Final Thoughts

The key to removing pet vomit from a mattress is acting fast, applying enzyme cleaner deeply enough to reach the foam, and allowing a long baking soda dwell time to draw out moisture and odor. Once clean, a waterproof mattress protector ensures you never have to go through this process again.

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