Frequently Asked Questions


Question Time

We have tried to answer as many common questions as possible on this page. It is unlikely we have answered everything 🙂

If there is anything which is not covered please contact us.

We are more than happy to help you in any way, just get in touch and we will try our best. 

Teeth Whitening FAQ's Online

Delivery & Returns

How are orders sent?

All orders are dispatched from our warehouses in either the USA, UK or Asia and sent on a free fully tracked first class service. This means your order will arrive quickly and safely and will be delivered by the postal service or DHL depending on the items you have ordered. 

How long will my order take to arrive?

If you have ordered a Crest item then your item will arrive in 3 – 6 business days, any other items will arrive in 1 – 3 business days. If your order seems to be taking longer than expected, try tracking your item or contacting our customer services team and they will be able to assist you.

Can I track my order?

Tracking information will be sent via email once dispatched. Generally the tracking information on a signed for service will only show an update once is in progress or delivery has been attempted.

Where do you ship to?

We are proud to say that we ship worldwide and it is totally free!

Are there any customs charges or import taxes to be paid?

No, products which are shipped from outside of Europe are a relatively low value therefore, there is no charges for the recipient of the parcel.

Can I change my delivery address?

Delivery addresses can be changed prior to dispatch. As most orders are sent out the same day we would recommend calling customer services.

Can I return my item?

Items can be returned for a full refund with in 30 days of purchase, the item must be in a re-sellable condition in original packaging, the packaging can not be damaged or have been opened. For any refund of purchase to commence, contact/complaint from the buyer must be with in 14 days from receipt of order. The return of goods can be with in 28 days from receipt of order. If the packaging has been opened, we can not accept a refund under any circumstance.

Teeth Whitening

How does teeth whitening work?

Teeth whitening is a simple process. Whitening products contain one of two tooth bleaches (hydrogen peroxide or carbamide peroxide). These bleaches break stains into smaller pieces, which makes the color less concentrated and your teeth brighter.

Is teeth whitening safe?

Yes, many studies have proven that teeth whitening is safe and does not cause damage to the enamel. The whitening systems are specifically designed to maintain teeth and gum health, while protecting your enamel & effectively whitening your smile.

Does teeth whitening work on false teeth or dentures?

Teeth whitening procedures only whitens natural teeth. It will not whiten caps, crowns, veneers, fillings or dentures. Do not use with dental braces. If you are in need of dental work, have dental work or have staining from medication, ask your dentist to determine if whitening is appropriate.

Is teeth whitening permanent?

No, I’m afraid no teeth whitening is permanent. The length of time your teeth will stay whiter is influenced by several factors, including how often you drink coffee, tea, dark colas, red wine or smoke. The average length of time whitening lasts is between 6 months and 2 years.

I have sensitive teeth, which teeth whitening product is right for me?

We would advise that our range of natural teeth whitening products would be best for you as because they don’t contain peroxide. This therefore means that they cause no sensitivity at all. You can try the Crest Whitestrips if you like but just start off first using them every few days and build them up. If you do experience sensitivity from the Crest Whitestrips please be aware this discomfort is only temporary and does not require medical attention.

Crest Teeth Whitening

How do I use Crest 3D Whitestrips?

It is best if you do not brush your teeth immediately before applying strips. Open the pouch and remove the strip. Peel the strips from the backing liner and align with gum line. Press gently for good contact. Fold the rest of strip behind teeth to keep in place. Wear strips for required amount of time, then remove and discard.

When will I start to notice results?

Noticeable results vary by person, but most people start seeing results after a few days, with full results upon completion of the full pack.

Can pregnant women use Crest Whitestrips?

While there is no evidence that teeth whitening while breastfeeding or being pregnant is harmful, we recommend you check with your doctor before using Crest 3D White Whitestrips.

Can I wear the strips longer than the instructed wear time to get better results?

We recommend following usage instructions for each product. Longer wear time can result in tooth sensitivity and/or gum discomfort.

Can I re use a strip?

No, Using a strip over again will not provide any tooth whitening benefits. Even though there may be gel remaining on the strip when you take it off, most of the hydrogen peroxide has been depleted.

What happens if I skip an application?

You can skip or miss a couple of applications without affecting your whitening benefit.

Is it okay to use 3D Whitestrips back to back?

Yes. With Crest 3D White Whitestrips, you can use one strip right after the other (back-to-back). Wear strips for the time instructed, then remove; rinse or wipe if needed, then apply a second strip.

What do I do if the strips keep coming off?

Look into a mirror to properly apply the strips, making sure the strip is in good contact with the teeth. If the strips begin to slip, close your mouth and create suction to tighten the strips up again. Don’t touch the strips excessively with your tongue. You can try gently tucking the strip in the spaces between your teeth with your fingernail, then folding it behind your teeth. Crest Professional Effects have Advanced Seal technology—specially designed to strongly adhere to your teeth.

Can I wear the strips overnight when I'm sleeping?

No, do not wear Whitestrips overnight or while sleeping. These treatments are designed to be worn for the recommended usage time only and can become a choking hazard if worn during sleep.

I sometimes have white spots on my teeth immediately after using Crest Whitestrips, will these go away?

Yes, the white spots are temporary. These spots are not harmful and will go away in a few hours.

How do I remove any excess gel left on my teeth after treatment?

Since the left over gel is not harmful, you can do any of the following:

  1. Rinse your mouth with water
  2. Wipe the gel off your teeth
  3. Brush it off
  4. Leave it, as it will dissolve eventually.
How long after whitening my teeth should I wait to eat?

Eating after whitestrips will not affect results. There are no eating or drinking restrictions after using Crest 3D White Whitestrips.

Can I brush my teeth before and after using Crest Whitestrips?

You can brush your teeth gently after using Crest Whitestrips but DO NOT BRUSH IMMEDIATELY BEFORE TREATMENT. This is to prevent any gum irritation from occurring. We recommend using Crest 3D White Brilliance Whitening toothpaste in conjunction with your strips for optimum results.

My Crest 3D whitestrips have expired, are they still ok to use?

Although Crest 3D White Whitestrips that have passed expiration date are still safe, we don’t recommend using them past their expiration date, as the whitening ingredient’s efficacy will be weakened.

What are the ingredients to Crest 3D Whitestrips?
WaterPrevents carbomer from dehydrating the teeth.
GlycerinHumectant, acts to thicken gel, helps make gel sticky so it will adhere to teeth.
Hydrogen PeroxideWhitening Ingredient
CarbomerGel agent, gives adhesion properties to gel
Polyvinylpyrrolidone (PVP)Adhesive polymer
PEGHumectant, acts to thicken gel, helps make gel sticky so it will adhere to teeth.
Acrylates CopolymerThickening polymer. Helps keep the strip in one piece during use.
Sodium Hydroxide*Adjusts pH to neutral
Sodium Saccharin*Better taste
Pyrophosphate*Protects against tartar in Crest 3D White Whitestrips Stain Shield only
* These ingredients are the source of sodium content – See Nutrition Facts twistie for total sodium content.
INGREDIENTS – Strip & Backing
Textured Whitening StripPolyethylene

Visit the store and select your crest product today.

Natural Teeth Whitening Kits and Charcoal Kits

What's different about these kits compared to the Crest Whitestrips?

Our Snow White and Charcoal botanical whitening systems use a Peroxide Free, 99% natural formulation that is also Vegan and Cruelty free. This means that they cause zero sensitivity and are fully EU regulated. They do not whiten quite as quickly as the Crest Whitestrips but gently achieve the desired results over a slightly longer time scale.

Will they whiten my teeth?

Yes, absolutely! Our natural teeth whitening products have been specially formulated to gently remove surface stains while enhancing the health of your teeth and gums. This formula has been scientifically shown to whiten your smile up to 8 shades whiter in just 10 days.

Will they cause any tooth or gum sensitivity?

Not at all! Our natural teeth whitening systems will not cause any sensitivity to your teeth or gums. We us a specially designed, Zero Sensitivity Formula that is EU approved to ensure you have no issues with pain while using these methods.

My LED light in my Snow White kit isn't working, what should I do?!

Don’t Panic! All you need to do is open the battery cover on the back of your LED Light, and remove the plastic sheet between the batteries and your device. Try also turning the batteries around PLEASE NOTE: The activation button is designed to not turn on when bumped. Please press this button firmly to activate your LED Light.

How often should I use these whitening kits?

We recommend completing your full course, then repeating every 3-6 months as required. Our Snow White Teeth Whitening Pens are also ideal for maintaining your smile between treatments.

What happens if I swallow the gel?

Don’t worry, you will be completely fine, the gels are completely safe if ingested and will not cause any ill effects.