How to Clean and Maintain Your Hot Tub Thermal Spa Cover

Posted by Steve Smith on June 27th, 2025

A hot tub thermal spa cover is essential for keeping your hot tub warm, clean, and energy-efficient. However, like any other part of your hot tub, it needs regular care to stay in good condition. Cleaning and maintaining your cover not only extends its life but also helps protect your hot tub from dirt, debris, and damage. Here’s a simple guide on how to keep your thermal spa cover in top shape.

Regular Cleaning is Key

The first step in maintaining your hot tub cover is regular cleaning. Outdoor covers are constantly exposed to sunlight, rain, leaves, and other elements that can lead to wear and tear over time. Aim to clean your cover at least once a month, or more often if you notice a buildup of dirt or mildew.

Start by removing any loose debris such as leaves, twigs, or dust. A soft broom or brush works well for this. Once the surface is clear, rinse the cover with a garden hose to remove surface grime.

Next, use a mild soap or a gentle cleaner mixed with warm water. Avoid harsh chemicals or bleach as they can damage the material and stitching. With a soft sponge or cloth, gently scrub the surface to remove dirt, stains, and any potential mildew spots. Once clean, rinse thoroughly with water to ensure no soap is left behind.

Keep the Underside Dry

Moisture trapped under the cover can lead to mildew and unpleasant odors. After using your hot tub, allow the underside of the cover to air out regularly by removing it for a few hours. This simple step can prevent moisture build-up and prolong the life of the cover’s inner foam.

Protect from the Sun

The sun’s UV rays can cause the cover material to crack, fade, or weaken over time. Using a UV protectant spray designed for spa covers can add a layer of protection against sun damage. Apply the protectant every few months to keep the cover flexible and resistant to cracking.

Handle with Care

Always lift your hot tub cover using the handles, not by pulling on the seams or edges. This helps prevent unnecessary tearing and keeps the cover’s structure intact. Consider using a cover lifter to make it easier to remove and replace the cover without dragging or bending it.

Inspect for Damage

Regularly check your spa cover for signs of wear, sagging, or waterlogging. If you notice the cover becoming too heavy, it may have absorbed water, which can reduce its insulating ability. In such cases, it might be time to replace it.

By following these simple cleaning and maintenance steps, you can keep your hot tub thermal spa cover in great condition and extend its useful life for years to come.