How to Clean Mold and Mildew From a Hot Tub

Mold and mildew thrive in warm, damp environments, which makes hot tubs a perfect breeding ground if they are not properly maintained. Left untreated, they can damage your spa and even pose health risks.

Dangers of Mold and Mildew

• Can cause unpleasant odors and stains

• May lead to skin irritation or respiratory issues

• Can deteriorate spa surfaces and equipment

Steps to Clean Mold and Mildew

Cleaning your hot tub thoroughly removes existing mold and mildew while also preventing it from coming back.

Drain the Hot Tub

• Turn off the power and drain all water from the spa.

• Use a submersible pump or the built-in drain to remove water quickly.

• Leave the cover open to allow the interior to dry slightly.

Clean the Shell

• Use a soft cloth or sponge with a spa-safe cleaner.

• Scrub all surfaces, including corners, jets, and seats.

• Pay extra attention to areas with visible mold or mildew stains.

• Rinse thoroughly with clean water.

Remove and Clean the Filter

• Take out the filter and spray it with a hose to remove debris.

• Soak the filter in a cleaning solution designed for hot tub filters.

• Let it dry completely before reinstalling.

Clean the Hot Tub Cover

• Wipe down the inside and outside of the cover with a mild cleaner.

• Disinfect with a diluted bleach solution (one part bleach to ten parts water) if mold is present.

• Rinse and let it air dry completely before putting it back on the hot tub.

Preventing Mold and Mildew in the Future

Keeping your hot tub clean and well-maintained will reduce the chance of mold and mildew coming back.

Keep the Water Balanced

• Regularly test and adjust chlorine or bromine levels.

• Maintain proper pH and alkalinity to keep the water safe and clean.

Regular Cleaning Schedule

• Wipe down the surfaces weekly.

• Remove and clean the filter monthly.

• Drain and deep clean every three to four months.

Improve Ventilation

• Leave the cover open for a few minutes after each use to let moisture escape.

• Ensure the area around the hot tub is well-ventilated.

Advanced Tips for Stubborn Mold

Use Vinegar or Baking Soda

• Apply white vinegar directly to small mold spots and scrub with a brush.

• For persistent stains, make a paste of baking soda and water to scrub affected areas.

Replace Old Parts

• If mold has penetrated into foam or fabric components, they may need replacing.

• Check for damage to seals or gaskets that could be trapping moisture.

Professional Cleaning

• If mold persists despite your efforts, consider hiring a professional to deep clean your spa.

Safety Tips While Cleaning

Protect Yourself

• Wear gloves and a mask to avoid exposure to mold spores.

• Make sure the area is well-ventilated while using cleaning products.

Use the Right Products

• Only use cleaners specifically designed for hot tubs to avoid damaging the surface or water chemistry.

• Avoid harsh chemicals that can leave harmful residues.

Helpful Notes

• Always rinse thoroughly after using any cleaner to prevent foaming and irritation when refilling.

• Keep a regular maintenance log so you can track when the spa was last cleaned and treated.

• Inspect your spa cover regularly since it is often the first place where mold forms.

By following these steps, you can effectively remove mold and mildew from your hot tub and maintain a clean, safe, and inviting environment for everyone to enjoy.