How to Get Rid of Bathroom Odors
Written by Shannon, Owner and Founder of Long Island MaidsAir fresheners just mask the problem. If your bathroom has a persistent smell, something is causing it—and you need to find the source. Here's how to identify common bathroom odors and eliminate them for good.
Step 1: Identify the Smell
Different odors have different causes. Identifying what you're smelling narrows down where to look:
Likely causes: Dry P-trap, broken wax ring on toilet, cracked drain pipe, blocked vent stack, or biofilm in drains.
Check: Run water in all drains (especially rarely-used ones). Check toilet base for moisture. Sniff individual drains to isolate the source.
Likely causes: Mold or mildew growing in hidden moisture areas—under sink, behind toilet, in walls, in exhaust fan, or in grout/caulk.
Check: Look for visible mold, check for leaks under sink and around toilet base, inspect caulk lines and grout.
Likely causes: Urine absorbed into caulk, grout, subfloor, or wax ring. Common around toilet base, behind toilet, and on floor.
Check: Get close to the floor around the toilet. Check the toilet seat hinges and bolt covers. Inspect caulk at toilet base.
Likely causes: Cleaning product residue, mixing cleaners (dangerous!), or chlorine from water supply.
Check: Did you recently clean? Are products properly stored? Never mix bleach with ammonia or acids.
Fixing Sewer / Drain Odors
Dry P-Trap (Most Common)
Every drain has a P-trap—a curved pipe that holds water to block sewer gas. If a drain isn't used regularly, the water evaporates.
Fix: Run water in all drains for 30 seconds. For floor drains, pour a bucket of water down. Add a tablespoon of mineral oil to slow evaporation in rarely-used drains.
Biofilm Buildup in Drains
A slimy biofilm of bacteria, soap, and debris coats drain pipes and produces odors.
Fix: Pour ½ cup baking soda down the drain, followed by ½ cup vinegar. Wait 15 minutes, then flush with boiling water. For stubborn buildup, use an enzyme drain cleaner. See our drain cleaning guide for more.
Broken Toilet Wax Ring
The wax ring seals the toilet to the drain pipe. When it fails, sewer gas escapes.
Signs: Smell strongest near toilet base, water or moisture around toilet base, toilet rocks when you sit.
Fix: Replace the wax ring—this requires removing the toilet. Consider calling a plumber if you're not comfortable with the task.
Fixing Mold & Mildew Odors
- Find the source: Check under sink, behind toilet, around tub/shower, in exhaust fan, and any areas that stay damp
- Clean visible mold: Spray with bleach solution (1 cup bleach to 1 gallon water) or hydrogen peroxide. Let sit 10 minutes, scrub, rinse
- Replace moldy caulk: Mold penetrates caulk—if cleaning doesn't work, remove and replace it
- Fix moisture source: Repair leaks, improve ventilation, or address humidity issues
- Run exhaust fan: During showers AND for 30 minutes after
See our complete mold removal guide for detailed instructions.
Fixing Urine Odors
Around the Toilet
- Clean the entire toilet exterior with disinfectant
- Remove bolt covers and clean around bolts
- Clean seat hinges thoroughly (remove seat if possible)
- Clean floor around toilet with enzyme cleaner—not just the visible area
- If caulk around toilet base smells, remove and replace it
In Grout or Subfloor
If urine has soaked into grout or (worse) the subfloor beneath tile, you need enzyme cleaner:
- Apply enzyme-based urine remover (like Nature's Miracle) generously
- Let it soak—enzymes need time to break down uric acid
- Reapply as needed over several days
- For severe cases, grout may need replacement or the subfloor may need treatment
Improving Bathroom Ventilation
Poor ventilation causes or worsens most bathroom odors:
- Run exhaust fan properly: During showers and 30+ minutes after
- Clean exhaust fan: Dust-clogged fans don't work effectively
- Check that fan vents outside: Some fans just vent into the attic—a major problem
- Leave door open: When not in use, let air circulate
- Consider a dehumidifier: For chronically humid bathrooms
- Upgrade your fan: If it's weak, replace with a higher CFM model
Natural Odor Absorbers
These absorb odors rather than just masking them:
- Baking soda: Leave an open box in the bathroom, replace monthly
- Activated charcoal: Place charcoal bags in cabinet or near toilet
- White vinegar: A small bowl of vinegar absorbs odors overnight
- Coffee grounds: Dried grounds in a dish absorb smells
- Houseplants: Some plants help filter air (pothos, spider plant, peace lily)
Preventing Bathroom Odors
- Clean regularly: Weekly cleaning prevents odor-causing buildup
- Run water in all drains: Monthly, to keep P-traps full
- Fix leaks immediately: Moisture leads to mold and odors
- Ventilate properly: Always use exhaust fan
- Keep toilet clean: Especially under the rim and around the base
- Wash bath mats: They trap moisture and bacteria
- Empty trash regularly: Don't let it sit
Persistent Odor You Can't Find?
Our team gets into every corner and addresses odor sources you might miss. We'll leave your bathroom fresh and clean.
Serving: Great Neck · Manhasset · Garden City · Old Westbury · Roslyn · +40 more
Frequently Asked Questions
Why does my bathroom smell like sewer or rotten eggs?
Sewer smell usually comes from a dry P-trap, broken toilet wax ring, or biofilm in drains. P-traps hold water that blocks sewer gas—if a drain isn't used regularly, the water evaporates. Run water in all drains for 30 seconds. If smell persists, check for toilet base moisture (wax ring failure) or call a plumber for pipe issues.
How do I get rid of urine smell around my toilet?
Urine absorbs into caulk, grout, and even subfloors. Clean the entire toilet exterior, remove bolt covers and clean around bolts, clean seat hinges thoroughly, and clean the floor around the toilet with enzyme cleaner. If caulk around the base smells, remove and replace it. Enzyme cleaners break down uric acid that regular cleaners miss.
What causes musty or moldy bathroom smell?
Musty smell indicates mold or mildew growing in hidden moisture areas—under the sink, behind the toilet, in walls, in the exhaust fan, or in grout/caulk. Look for visible mold, check for leaks under sink and around toilet base, inspect caulk lines. Fix the moisture source and clean mold with bleach solution or hydrogen peroxide.
How can I improve my bathroom's ventilation?
Run exhaust fan during showers AND for 30+ minutes after. Clean dust-clogged fans. Check that the fan vents outside (not into the attic). Leave the door open when not in use. Consider a dehumidifier for chronically humid bathrooms. Upgrade to a higher CFM fan if yours is weak.
What natural products absorb bathroom odors?
Baking soda (leave an open box, replace monthly), activated charcoal bags, white vinegar (a small bowl absorbs odors overnight), dried coffee grounds, and certain houseplants (pothos, spider plant, peace lily). These absorb odors rather than just masking them like air fresheners do.
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