How to Store and Care for Your SmilePro Whitening Kit Properly

Store your SmilePro whitening pens with the cap on, in a cool, dry place out of direct sunlight, and use them before the expiry date printed on the pack. Rinse the LED light's mouth tray with water after every treatment, let it dry, and keep the light, pens and cable together in the charging case, which doubles as a travel case.

Getting strong, consistent results from your SmilePro kit isn't just about how you use it. It's also about how you store and look after it between sessions. This guide covers everything you need to know to get the most from your kit.

Why does proper storage matter?

Whitening gel works best when it is fresh and has been stored well. Heat and direct sunlight are best avoided for most cosmetic products, and a cap left off lets the gel dry out. Storing your kit properly is one of the simplest ways to protect your investment and make sure every session delivers the results you expect.

How to store your whitening pens

Keep them cool, dry and out of the sun

Store your pens in a cool, dry place away from direct sunlight. Good spots include:

• A bathroom cabinet or drawer, away from shower steam
• A bedside table drawer
• A cool indoor cupboard

Avoid places where heat builds up or the temperature swings:

• A sunny windowsill or bench
• A hot car, especially in summer
• Near a heater, hair dryer or other heat source
• A very steamy bathroom

Tip for hot summers: if your home gets very hot, some people keep their pens in the fridge, with the cap firmly on. Do not freeze them.

Put the cap back on after every use

After each treatment, put the cap back on the pen firmly before you store it, so the gel stays sealed between sessions.

Check the expiry date

SmilePro whitening gel has a shelf life of 24 months, and the expiry date is printed on the pack. Check it before you use a pen, especially a refill pen that has been in the cupboard for a while, and do not use gel after its expiry date.

Running low? Shop the SmilePro Whitening Pen Pack before your next session →

How to look after your LED light and mouth tray

The SmilePro LED light is rechargeable and water-resistant, with a built-in mouth tray, and it switches itself off after 10 minutes. A little care after each session keeps it clean and working well. After each treatment, wait 1 hour before eating or drinking anything except water.

Clean it after every session

After each treatment, take the tray out, rinse your mouth with water and rinse the tray under cool running water to remove any leftover gel. A soft toothbrush helps lift gel from the grooves; rinse again afterwards. Avoid hot water.

Dry it before storing

Shake off the water and let the tray dry fully before you put it away, so it is not stored damp.

Store it in the charging case

Keep the light in its charging case when you are not using it, rather than out on a bathroom bench where it can collect dust. The case doubles as a travel case.

Skip harsh cleaners

Do not clean the tray with bleach, strong disinfectants or alcohol-based products: water and a soft brush are all you need.

Keep it away from direct heat

Avoid leaving the light in a hot car, near a heater or in direct sunlight for long periods.

How to charge your LED light

• Charge the light fully before your first treatment, and recharge it as needed between sessions.
• Use the charging cable that came with your kit, with or without the case.
• Keep the cable with your kit so it is always to hand.
• If the light seems dimmer than usual, give it a full charge.

How to travel with your whitening kit

• Pack the light, pens and cable in the charging case, which doubles as a travel case.
• Keep the pens capped, and pop them in a small zip-lock bag for extra protection.
• Keep the kit in your carry-on rather than checked luggage where you can, as holds can get very hot or very cold.
• In a hot climate, store the kit somewhere cool, such as an air-conditioned room.

Travelling light? SmilePro Teeth Whitening Strips need no light at all, and suit top-ups on the go.

When should you replace your whitening pens?

Replace a pen when it is empty or past the expiry date printed on the pack. Each pen holds 10 treatments, so the 3 pens in the kit give you 30, and a Whitening Pen Pack adds another 30, which last over a year at one top-up every 2 weeks.

Also replace a pen if the gel has changed colour, become watery or separated, or if you are using it correctly but your results are noticeably weaker than before.

Tip: order refill pens before you run out completely, so you can keep up your top-ups every 2 weeks without a gap that lets stains build back up.

Shop the SmilePro Whitening Pen Pack and keep your smile bright without interruption →

Quick care checklist

• Store pens in a cool, dry place, never in a hot car or near direct heat.
• Put the cap back on firmly after every use.
• Check the expiry date printed on the pack.
• Rinse the mouth tray with cool water after every session.
• Dry the tray fully before storing.
• Keep the light in its charging case when not in use.
• Avoid harsh cleaners and hot water.
• Reorder refill pens before you run out.

A little care goes a long way

Your SmilePro kit is built to last, and like any well-made product, it performs best when it is looked after. These simple habits mean every session delivers the results you expect, and your kit stays clean and working for as long as possible. Remember that the gel is always used with the light.

SmilePro whitening products are not suitable for anyone under 18, or anyone pregnant or breastfeeding. If you have sensitive teeth or unhealthy gums, see a dentist first.

Keep your kit stocked: shop SmilePro refill pens →

Related: Teeth whitening aftercare, how to keep your smile white for longer →

Related reading:

• How long does teeth whitening last?

Sources

• SmilePro product information: Advanced Teeth Whitening Kit (what's in the box, the LED light), Whitening Pen Pack, and How it works. Gel shelf life: SmilePro, 7 October 2026.

Last updated: 7 October 2026.