Frequently Asked Questions

Your one-stop-shop for product qualms and delivery hiccups


My teeth are really sensitive, which products can I use?

All of our products are designed to be gentle on teeth. Smirk Powder contains ingredients that actually calm the nerves and form a barrier over microscopic holes in your enamel, helping with sensitivity. Most users won’t experience discomfort or sensitivity with our Teeth Whitening Strips either, since they are peroxide-free. Discontinue use or consult your dentist if you do experience sensitivity with Smirk strips. All of that being said, if you have bleeding or receding gums, or damaged teeth, please see a dentist before use (they don’t bite!)

Which products are safe to use while breastfeeding?

Smirk Powder is safe for use while pregnant or breastfeeding. Smirk Strips are not recommended for use while pregnant or breastfeeding.

Can I use Smirk products while I have braces?

 Sorry, we cannot recommend the use of any whitening products on teeth with fixed braces. You can safely use all Smirk If you’re using a removable clear aligner system.

How often can I use Smirk products?

Smirk Powder is a mild abrasive, it is perfectly safe for use 2 times a week before brushing with your usual toothpaste.  We advise a maximum of two applications per week.

In the first week, you can use it once per day. Brush for 3 to 4 mins per-use, then rinse well and use your regular toothpaste. Week 2 onwards, revert to the normal regular use, once or twice a week. This will ensure your enamel is protected, whilst getting smirk-worthy whitening results.

Smirk Strips and Smirk Box can be used daily.


Ultrasonic Tooth Cleaner:

  • Charge the device for 3 hours and press the on button with your thumb to activate it. Pressing the button multiple times will increase the speed.
  • Using the scaler attachment, gently run it over the fronts and backs of your teeth for 2-3 minutes, targeting areas with a higher buildup of plaque.
  • Switch to the interdental attachment and clean between your teeth and in any difficult-to-reach areas for an additional 2 minutes, again focusing on areas with higher plaque buildup.
  • Finally, switch to the brush attachment and use it to polish your teeth with toothpaste for 2 minutes.

Teeth Whitening Powder

During the first week, you can use your powder daily (be sure to brush for 3-4 minutes to allow the stain-removing agents to work effectively). Rinse and follow with your regular toothpaste.In the second week and beyond, use the powder once or twice per week. Once all staining has been removed, use it once per week or every two weeks to maintain results. Remember to continue with your regular dental hygiene routine.

Orders & shipping

I can't find my order, can you help?

Absolutely! Tap here to contact us via phone or email and we’ll get this all straightened out.

How quickly can you deliver within the UK?

That depends on the shipping options you choose! We dispatch same-day on orders placed by 1PM GMT and offer the following shipping options:

We offer the following services:
– Royal Mail Signed For® 1st Class
– Royal Mail Signed For® 2nd Class
– DHL® Next Day
– DHL® Express

Do you ship outside the UK?

We ship worldwide. Costs vary by country and will be quoted at checkout. Most international parcels are received within 7-14 working days.

What if my package is returned to sender?

Everything we ship is tracked and signed. If your shipment is returned to us then the cost of the product minus any postage will be refunded automatically. Double-check that your address is entered correctly at checkout to avoid this.

Have a question we didn't answer here?

Have a question we didn’t answer here? Let us know and we’ll be happy to help! Contact us

Klarna - How does Pay in 3 instalments work?

Klarna’s Pay in 3 instalments is a credit product that lets you spread the cost of your purchases over
3 equal payments. Klarna will take the payments from your debit or credit card directly so you don't
have to worry about missing a payment. Klarna will take the rst payment when you make the
purchase, the second 30 days later and the nal payment 60 days from your purchase date. You can
see your past and future payments at any time using the Klarna app.


To learn more about our free and paid delivery options please see this page.

Call Us

Got a question or simply just fancy a chat? Call 0114 267 6771, we don’t bite! Our support team are active Monday to Friday 11AM – 5PM.

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