How to Remove Pet Urine from Mattress

A pet urine accident on a mattress is one of the more challenging cleaning situations — the liquid soaks quickly through the surface into the foam beneath, and if not treated properly, the odor can linger for months. Here's how to remove pet urine from a mattress completely, including the smell.

Act Immediately for Best Results

Fresh urine is far easier to remove than dried urine. The moment you discover the accident, start blotting — every minute the urine soaks deeper into the foam padding.

For Fresh Urine on Mattress

Step 1: Strip the Bed and Blot

Remove all bedding immediately and put it in the wash. 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 2: 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 a very long time 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 uric acid crystals in mattress foam.

Step 3: Blot Again

Blot the enzyme cleaner and loosened residue with a clean 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.

Step 4: 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 5: 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 that's covered too soon can develop mold and mildew.

For Dried or Old Urine on Mattress

Step 1: Locate with UV Light

Dried urine is invisible but glows under UV light. Use a black light in a darkened room to find the exact boundaries of old stains.

👉 Recommended: Vansky UV Flashlight Black Light, 51 LED

Step 2: Apply Stronger Enzyme Cleaner

For set-in urine, use a stronger formula and allow extended dwell time of 15–20 minutes.

👉 Recommended: Rocco & Roxie Extreme Stain & Odor Eliminator — for old or heavily set-in urine odor in mattress foam.

Step 3: Extended Baking Soda Treatment

Apply baking soda generously and leave for 24 hours for old stains. Vacuum thoroughly. Repeat the full treatment if odor persists after drying.

Protect the Mattress Going Forward

A waterproof mattress protector is the single best investment after cleaning a urine 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. Queen size available.

Washing the Bedding

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

Final Thoughts

The key to removing pet urine 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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