FAQs

Klean Smile is a modern oral after-care brand offering practical, technology-led products designed to make everyday oral hygiene and dental-appliance care easier and effective. Our range has been shaped by real experience with braces, clear aligners, retainers, cosmetic dental work and removable dental appliances.

We focus on accessible luxury: high-quality, premium-feeling oral-care technology without an unnecessarily high-end price tag. We choose products that can simplify repetitive parts of an after-care routine and give customers more convenient ways to care for their smile and dental appliances.

Our range is inspired by products and technologies we have personally used and valued in our own oral after-care journeys. Customers should always follow the instructions supplied with their individual product and any advice given by their dentist, orthodontist or hygienist.

Our range includes ultrasonic dental-appliance cleaners, electric water flossers, UV toothbrush-head sterilisers, UV-light whitening electric toothbrushes and other oral after-care products.

Depending on the item's manufacturer care instructions, an ultrasonic cleaner may be suitable for removable dental appliances including clear aligners, retainers, teeth whitening trays, dentures and clip-in veneers. It may also be suitable for certain jewellery and toothbrush heads etc. Always check that the specific material or item is compatible with ultrasonic cleaning before use.

The cleaner can be used with luke warm water alone where the product and appliance instructions allow. A compatible cleaning or sterilising tablet/capsule may also be used where appropriate, we would advise Milton tablets. Never add a substance that is not approved for the device or the item being cleaned.

Ultrasonic technology helps loosen debris from surfaces and difficult-to-reach areas without relying on vigorous manual scrubbing. This can be particularly useful for appliances where aggressive brushing may contribute to scratching or spreading bacteria rather than deep cleaning. 

A water flosser directs a controlled stream of water around the teeth, between teeth and along the gumline. It can make interdental cleaning more convenient and can be particularly useful around braces, bridges, natural teeth and other dental work. It supports, rather than replaces, appropriate brushing and professional dental care.

No. A water flosser is designed to complement your oral-hygiene routine. Continue brushing as recommended and follow your dentist or hygienist's advice about interdental cleaning.

Klean Smile dispatches parcels using a Royal Mail tracked service.

Customers pay for delivery at checkout and can choose from the delivery options available for their order, including Standard Delivery or Next Day Delivery where offered.

Tracking information is normally sent by text message and/or email within approximately 12 hours of dispatch. Please check that your contact information is entered correctly at checkout.

Use the Royal Mail tracking reference supplied after dispatch to follow your parcel's progress through the Royal Mail network.

Check your Royal Mail tracking first. If your parcel appears significantly delayed, has stopped updating or you believe it may be missing, contact Royal Mail directly as they will be able to advise according – any further issues please contact Klean Smile.

Contact us as quickly as possible. We cannot guarantee that an address can be amended once an order has entered the 

For eligible online purchases, you may notify Klean Smile that you wish to cancel within 14 days beginning the day after you receive the goods. You then have a further 14 days to send the eligible goods back after notifying us of the cancellation.

Yes. Contact Klean Smile Customer Service before sending a return so we can provide the correct returns address and instructions. Do not send an item to an unconfirmed address.

Products should be unused, sealed, untampered with, in their original packaging and in the condition received. For sealed products that are not suitable for return for health protection or hygiene reasons, the statutory cancellation right can be lost once the seal is broken after delivery.

Change-of-mind returns may not be accepted where a hygiene-sealed product has been unsealed and is not suitable for return for health-protection or hygiene reasons. This does not affect your legal rights if a product is faulty, damaged, incorrect or not as described.

Once you have received return instructions, package the item securely and send it to the address provided using a Royal Mail tracked service. Keep your tracking receipt and reference until Klean Smile confirms that your return has been received and processed.

Keep your proof of postage and tracking information. Where you arranged the return carriage, you may need to raise a lost-parcel enquiry or claim with Royal Mail. Valid evidence that the goods 

For eligible returns, the customer is responsible for the direct cost of return postage where this was communicated before purchase.

Contact Klean Smile immediately or as soon as reasonably possible with your order details and a description of the fault. We may request photographs or video to help assess the issue.

Alongside paying in full, eligible customers may be offered third-party flexible payment options at checkout, including Clearpay, Klarna and Shop Pay Installments, depending on availability and eligibility.

Yes. Where a payment provider offers a credit arrangement, customers should review the repayment schedule, eligibility criteria and provider terms carefully before committing. Only borrow what you can comfortably afford to repay.

No. Third-party payment providers determine eligibility and may carry out checks. Klean Smile does not make the lending decision.

For questions specifically about a finance account, payment schedule, declined application or repayment, contact the relevant payment provider. For questions about your Klean Smile order itself, contact Klean Smile Customer Service.

No. Our products are designed to support everyday oral after-care and hygiene routines. They do not diagnose, treat or replace professional dental or medical care.

Klean Smile Customer Service is available via email and our official social-media channels Monday to Friday, 10:00am–6:00pm. Messages received outside these hours will be reviewed during the next available customer-service period.

Please provide your full name, order number, the email address used when ordering and a clear description of your query. If you are reporting a damaged or faulty product, photographs or video may help us investigate more quickly.