How to Clean a Hot Tub: Easy Steps for a Sparkling Soak

Hot tubs aren’t self-cleaning (unfortunately), but the good news is that keeping them clean doesn’t have to be hard work. The short answer? Test, scrub, rinse, and refill. Whether you’ve got a sleek Acrylic Hot Tub, a plug-and-play Rotomoulded model, or a charming Wooden Hot Tub, there’s a simple routine that’ll keep things fresh. You don’t need to dread maintenance days, this guide breaks it down into easy wins you can manage without breaking a sweat.

Why Regular Hot Tub Cleaning is Essential

Maintaining Safe and Hygienic Water

Hot tubs are warm, bubbly, and unfortunately, perfect for bacteria. When sanitiser levels drop, your water quickly becomes a breeding ground for algae and other nasties. No one wants to soak in that. Clean water keeps your skin happy, your eyes irritation-free, and your whole body safe. Just like brushing your teeth, it’s a small habit that makes a big difference.

Protecting Your Hot Tub's Components

Mineral buildup and grime don’t just look bad, they cause problems. Unbalanced pH levels can eat away at pumps, jets, and pipework. Think of it like ignoring oil changes in your car. The longer you put it off, the more expensive it gets. Regular cleaning helps prevent damage before it starts.

Ensuring Peak Performance and Longevity

A clean tub works better. Jets stay strong, filters don’t clog, and the water heats faster without draining your wallet. The better you treat your hot tub, the longer it lasts—and the fewer surprise breakdowns you’ll have to deal with.

Routine Cleaning Tasks (Weekly / Fortnightly)

Wiping the Shell at the Waterline

See that scummy ring around the shell? That’s a mix of sunscreen, body oil, and random grime. Wipe it away once or twice a week using a soft cloth and spa-friendly cleaner. Skip the bleach and abrasive sprays, they’ll damage your tub’s surface.

Removing Surface Debris

Leaves, insects, and the occasional rogue crisp love to float on the surface. A quick skim with a net every few days keeps things looking inviting. It takes two minutes. Do it before guests come over and you’ll look like a hot tub pro.

Cleaning the Skimmer Basket Area

Your skimmer basket catches all the stuff you don’t want to see floating. But it can only help if it’s not full. Rinse it under the tap weekly, and wipe around the edges while you're at it. Your pump will thank you.

Rinsing the Hot Tub Filters

Once a week, take out the filters and give them a gentle hose down. This clears out the gunk and helps keep the water moving cleanly. Don’t go wild with a pressure washer, it’ll ruin the filter pleats. A gentle rinse is enough.

The Deep Clean Routine (Every 3–4 Months)

Step 1: Prepare by Flushing the Pipework

Before draining, use a pipe flush product. It clears out slime and buildup hiding inside the plumbing. Run the jets for about 20 minutes and let them do their thing. You’ll be surprised what comes out.

Step 2: Safely Drain Your Hot Tub

Power off first, always. Then open the drain valve or use a pump to get the water out. Make sure every last bit drains before moving on. Don’t skip this part. Trapped water leads to mould and other issues.

Step 3: Clean the Hot Tub Shell Interior

Once it’s empty, spray down the inside with a non-abrasive spa cleaner. Wipe it all down with a sponge. For mineral stains, a vinegar-water mix works wonders. Just rinse everything well afterwards.

Step 4: Deep Clean or Replace Filters

Take out the filters and give them a proper soak using filter cleaning solution. Let them sit overnight, rinse well, and dry completely before putting them back. If they’re looking tired or grey, it might be time to replace them.

Step 5: Clean the Hot Tub Cover (Both Sides)

Use a vinyl-safe cleaner to wipe down the top and underside. Once dry, apply a UV protectant to help prevent cracking and fading. Clean covers stop debris and moisture from sneaking into your spa.

Step 6: Inspect and Clean Jets and Headrests

Remove the headrests and wipe them with a soft cloth. Jets may need a gentle brush or soak if they’re starting to look gunky. A vinegar bath works for most, just make sure you rinse them well before reinstalling.

Step 7: Refill with Fresh Water

Use a hose with a pre-filter attached. It reduces hard water minerals and keeps your fresh fill from messing with water balance. Fill to the recommended level, not too low, not too high.

Step 8: Balance Water Chemistry After Refilling

Test your water as soon as the tub is full. Adjust pH, alkalinity, and sanitiser levels right away. Aim for a pH between 7.2–7.8 for the best balance. A well-balanced tub feels better and stays clean longer.

Cleaning Specific Hot Tub Parts Effectively

Best Practices for Cleaning Acrylic Shells

Stick to spa-safe, non-abrasive cleaners. Avoid bleach, all-purpose sprays, or anything that smells suspiciously like a bathroom cleaner. Wipe gently using a cloth or soft sponge, no scrubbing pads or magic erasers.

A Guide to Cleaning Hot Tub Filters (Rinsing vs. Chemical Soaking)

Rinse filters weekly with a hose. But once a month, give them a deep clean soak. Chemical soaking dissolves oils and buildup that a rinse can’t shift. Follow the label and let them dry before popping them back in.

How to Clean and Protect Your Hot Tub Cover

Wipe it down once a month with a gentle cleaner. Then use a UV conditioner to stop fading and cracking. If you’re in the UK, make this part of your winter prep; it helps the cover survive cold snaps and rain.

Getting Grime off Hot Tub Jets

Some jets twist out easily. Soak them in vinegar if they’re clogged or sticky. Scrub gently with an old toothbrush, rinse well, and reinstall. Jets that work smoothly = a better soak every time.

Essential Cleaning Supplies for UK Hot Tub Owners

Choosing Appropriate Shell Cleaners (Avoid Household Products)

Use pH-balanced cleaners specifically made for spas. Don’t risk your hot tub shell with harsh sprays or bathroom products. What works in your kitchen might destroy your tub’s finish.

Effective Filter Cleaning Solutions

Get a dedicated spa filter cleaner, liquid or granules both work well. These products break down grease, minerals, and stubborn grime. Soak, rinse, dry, and repeat every month for best results.

Cover Cleaning and Conditioning Products

Vinyl-safe sprays keep covers fresh and prevent mould. UV conditioners protect against sun damage and cracking. Especially important if your hot tub lives outdoors year-round.

Recommended Cloths, Sponges, and Tools

Microfibre cloths, soft sponges, and non-abrasive brushes are your best friends. A spa vacuum or hose attachment can help clean the base without draining. Keep your tools clean and separate from household supplies.

Conclusion: Keeping Your Hot Tub Clean and Inviting

Keeping your hot tub spotless isn’t about being perfect; it’s about being consistent. A few minutes each week, a proper deep clean every few months, and using the right products go a long way. Your Acrylic Hot Tub, Rotomoulded spa, or Wooden soak zone will thank you with better performance and cleaner water.

You don’t need to dread hot tub maintenance. With a simple rhythm and a few smart habits, cleaning becomes second nature, and your soak stays stress-free.