How to Clean the Inside of a Hot Tub Shell

Over time, dirt, body oils, and chemical residue can build up on the hot tub shell. Regular cleaning keeps it sanitary and prevents surface damage while maintaining its attractive appearance.

Problems Caused by Neglecting the Shell

• Stubborn stains and discoloration

• Slippery and unsafe surfaces

• Harbored bacteria and unpleasant odors

• Reduced lifespan of the shell material

Tools and Supplies You Will Need

Having the right materials ready makes cleaning quick and effective.

Basic Supplies

• Soft cloth or sponge

• Non-abrasive cleaner designed for hot tubs

• White vinegar or mild dish soap

• Bucket of warm water

• Soft-bristle brush (optional)

Optional Extras

• Spray bottle for cleaner

• Microfiber towels for drying

• Protective gloves

Step-by-Step Guide to Cleaning the Hot Tub Shell

Follow these steps to clean your hot tub shell without damaging it.

Step 1: Drain the Hot Tub

• Turn off the power to the hot tub.

• Attach a hose to the drain spout and allow the water to fully drain.

• Use a wet vacuum if needed to remove any remaining water at the bottom.

Step 2: Rinse Loose Debris

• Use a garden hose or a bucket of clean water to rinse away leaves, dirt, and debris.

• Focus on corners and areas around the jets where grime tends to collect.

Step 3: Apply Cleaner

• Spray or apply a non-abrasive cleaner onto the shell.

• Avoid harsh chemicals like bleach, which can damage the finish.

• Let the cleaner sit for a few minutes to loosen grime.

Step 4: Scrub the Surface

• Use a soft cloth or sponge to gently scrub the shell.

• For stubborn spots, use a soft-bristle brush with light pressure.

• Pay attention to waterline marks and corners.

Step 5: Rinse Thoroughly

• Rinse the shell completely with clean water to remove all cleaner residue.

• Wipe down with a clean microfiber towel to prevent water spots.

Step 6: Dry and Inspect

• Dry the shell completely with towels.

• Inspect for cracks, chips, or stains that may need extra care.

• Address minor damage right away to prevent further problems.

Advanced Tips for a Sparkling Finish

Removing Stubborn Stains

• Use a paste of baking soda and water on tough spots.

• Gently rub the paste with a soft cloth and rinse thoroughly.

Preventing Future Build-Up

• Wipe down the shell after each use to minimize residue.

• Keep water properly balanced to reduce scaling and staining.

Preventive Maintenance Habits

Maintaining your hot tub shell goes beyond occasional cleaning.

Regular Habits

• Drain and clean your hot tub every 3–4 months.

• Test and balance water chemistry weekly.

• Cover your hot tub when not in use to keep debris out.

Seasonal Considerations

• In summer, clean more often due to increased use.

• In winter, ensure the shell stays dry during extended shutdowns.

Safety Tips While Cleaning

• Always turn off power before draining and cleaning.

• Wear gloves if using cleaners to protect your skin.

• Keep children and pets away from the area during cleaning.

Helpful Notes

• Avoid using abrasive pads or steel wool, which can scratch the surface.

• Store cleaning supplies in a dry, safe location.

• If unsure about a product, test it in a small area first.

By following this guide, you can keep your hot tub shell clean, safe, and beautiful for years of relaxing enjoyment.