How Do I Clean a Hot Tub Cover That’s Developing Mold?

Use a mixture of water and mild detergent or vinegar to clean the cover. Let it dry completely in the sun, and use a UV protectant spray to prevent future mold growth.

Why Does Mold Develop on Hot Tub Covers?

Mold and mildew can develop on hot tub covers for several reasons, including:

• Excessive moisture: The combination of heat and humidity inside the cover, especially when the tub is not in use, provides an ideal environment for mold to grow.

• Poor ventilation: Hot tub covers that aren’t properly ventilated trap moisture, making it easier for mold and mildew to take hold.

• Lack of regular cleaning: Without consistent maintenance, dirt, oils, and moisture build up on the cover, creating a breeding ground for mold.

• Direct exposure to rain or snow: Covers that are exposed to outdoor elements without proper protection can become damp and moldy over time.

How to Clean a Moldy Hot Tub Cover

Once you spot mold on your hot tub cover, it’s time to act. Here’s how to clean it effectively and safely:

1. Gather Your Cleaning Supplies

Before you begin, make sure you have the necessary supplies. You’ll need:

• Mild dish soap or a specialized cleaner for hot tub covers

• White vinegar or a commercial mold remover

• Bucket of warm water

• Soft-bristle brush (or sponge)

• Towels or rags for drying

• Garden hose for rinsing

• Protective gloves to protect your hands from chemicals

2. Remove the Hot Tub Cover from the Tub

Start by removing the hot tub cover from the tub and placing it on a flat surface, such as a clean driveway or patio. This will make it easier to clean the cover thoroughly and ensure you don’t get any cleaning solution in the water.

3. Inspect the Cover and Identify Problem Areas

Take a close look at the hot tub cover to identify where the mold is growing. Mold usually appears as dark spots or patches. Check all areas of the cover, including the seams, the underside, and around the edges, as these are common places for mold to form.

4. Scrub the Moldy Areas

Fill a bucket with warm water and add a few drops of mild dish soap, or use a specialized cleaner designed for hot tub covers. Dip your soft-bristle brush or sponge into the solution, then gently scrub the moldy areas. Be sure to focus on the seams and corners where mold tends to accumulate.

• Tip: Avoid using harsh chemicals or abrasive materials, as they can damage the cover material.

For tougher mold spots, apply white vinegar directly to the mold and let it sit for 10-15 minutes before scrubbing. White vinegar is a natural mold killer that won’t damage your hot tub cover.

5. Rinse and Repeat If Necessary

After scrubbing, rinse the hot tub cover thoroughly with a garden hose to remove any soap or vinegar residue. If mold persists, repeat the process until the cover is completely clean. Don’t forget to rinse both sides of the cover.

6. Dry the Hot Tub Cover Thoroughly

Once the cover is clean, it’s important to dry it completely to prevent mold from returning. Lay the cover out flat in a sunny area and allow it to dry for a few hours. If possible, prop it up on a few objects so air can circulate underneath.

• Tip: Make sure the cover is completely dry before putting it back on the hot tub. Any remaining moisture can contribute to further mold growth.

7. Apply a Protective Cover Conditioner

After cleaning and drying the cover, consider applying a protective conditioner. This will help maintain the cover’s appearance, protect it from UV rays, and prevent future mold buildup.

You can find specialized hot tub cover conditioners at most pool supply stores. These products will help keep the cover looking new while also preventing mold from forming again.

Preventing Mold Growth on Your Hot Tub Cover

The best way to deal with mold is to prevent it from happening in the first place. Here are some tips to help you keep your hot tub cover mold-free:

1. Regularly Clean the Cover

Cleaning your hot tub cover at least once a month can help prevent mold buildup. Wipe down the cover after each use to remove oils, dirt, and moisture that could lead to mold.

2. Ensure Proper Ventilation

Good airflow is essential for preventing mold. Make sure the area around your hot tub is well-ventilated and that the cover is properly vented. If your cover doesn’t have built-in vents, consider adding vent panels to allow air to circulate.

3. Use a Cover Protector

When your hot tub is not in use, keep the cover on, but also use a cover protector to shield it from rain, snow, and dirt. A high-quality cover protector will also help keep the hot tub cover dry and protected from the elements.

4. Store the Cover During Winter

If you live in an area with harsh winters, consider removing the cover during the off-season and storing it in a dry place. This will prevent exposure to snow, rain, and freezing temperatures that can cause mold and mildew growth.

5. Keep the Hot Tub Clean

Regular cleaning of your hot tub will help minimize the amount of moisture and oils that can seep into the cover. Keep your pool water balanced, shock it periodically, and clean your filters to maintain a healthy hot tub environment.

6. Check for Leaks

Check the cover’s seams and edges regularly for leaks or wear and tear. If water seeps into the cover, it can lead to mold and mildew buildup. Replace damaged or worn-out covers as needed to prevent further issues.

7. Use a Mold-resistant Hot Tub Cover

If you’re purchasing a new cover, consider investing in one that’s mold-resistant. Many modern hot tub covers are made with materials designed to resist mold and mildew, providing extra protection against future growth.

8. Protect from Chemicals and Oils

When using lotions, oils, or other chemicals before entering the hot tub, avoid letting them come in contact with the cover. These substances can contribute to mold buildup over time. Wipe down the cover regularly to remove any residues.

9. Monitor Water Temperature

High humidity levels can encourage mold growth. If your hot tub is consistently hot and steamy, consider lowering the temperature slightly when not in use. This reduces the level of moisture and can help prevent mold from taking hold.