Keeping your hot tub covered for long periods of time can produce a musty or mildew smell on your cover after a time.
That’s why it’s important to keep your cover clean and free of these odors.
To help prevent this mildew smell, use a small amount of bleach (10%) added to water (90%) and wipe down the bottom of the hot tub cover every 60-90 days. This will help prevent your cover from getting that musty smell that everyone dislikes.