Does a Candle Warmer Make Candles Last Longer? What Happens to the Scent

We sell candle warmer lamps, so we would love to tell you a candle lasts forever on one. It does not. Here is what really happens to the wax and the scent, with sources at the bottom so you can check us.

What runs out first: the wax or the scent?

A scented candle is mostly wax. Candle supply company Candlewic tells candle makers to use about 6 to 10% fragrance oil in soy wax and 8 to 12% in paraffin, measured against the weight of the wax. So the part that smells is a small share of what is in the jar, and it is the part you actually paid for.

Why the wax lasts so much longer

When you light a candle, the wax is the fuel. Ashley Rossi, owner of Noted Candles, told WBUR that the wax and fragrance together are what keep the flame going, so every hour of burning uses up the candle itself. A warmer only melts the top. As Real Homes puts it, a warmer does not burn or evaporate the wax; it just releases the fragrance.

A warmer also rescues wax you would otherwise lose. When a candle tunnels, the ring of wax stuck to the glass never melts, and the fragrance in it is wasted. Heat from above melts the whole surface, so that wax finally gets its turn.

Why the scent still fades

Fragrance oil is meant to leave the wax. That is how you smell it. Heat speeds it up, and that is true for a bulb as much as a flame. Kate De Palma, founder of Scented Designs, told Real Homes that warmers generally melt the wax at a lower temperature than a flame and release the scent steadily over time. The flip side is simple: the more heat you use, the more scent comes out now, and the sooner it is gone.

Not every part of a fragrance leaves at the same speed. Austen Hemlepp, general manager of the Boston candle shop Candlefish, explained to WBUR that the lightest top notes come out first and stand out for about the first half hour, the middle notes carry most of the session, and the heavier base notes linger. That is why a candle can smell a little different an hour in than it did when you first switched the lamp on.

So does a warmer really stretch a candle?

For most people, yes. Candle maker Tay Baker of Claranda Tay Candles Co. told Real Homes that warming often gives a longer lasting fragrance than burning. Apartment Therapy writer Natalia Vela wrote that a scent that used to last her a month now stretches over two and a half months on a warmer.

To be fair, nobody has published a lab test that measures exactly how much longer, and your result depends on the candle, the setting and how many hours a day you use it. If you want the money side of it, we ran the numbers in Is a Candle Warmer Lamp Worth It? An Honest Cost Breakdown.

How to tell when a warmed candle is done

• The full melt pool test. Turn the lamp up until the wax is melted to the edges. If you can barely smell it from across the room, the fragrance is mostly gone.
• Rule out your nose. CandleScience notes that a fragrance you live with every day can seem weaker to you than to anyone else. Step out for a few minutes, or ask someone who just walked in.
• Smell it cold. Lift the lid on the cooled wax. A candle with scent left in it still smells when it is solid.
• Compare. If you have a fresh candle in the same scent, smell them side by side. The difference is usually obvious.

Wondering why a candle smells weaker on a warmer than you expected, even when it is new? See Candle Warmer vs Burning a Candle: Which Smells Better?

How to make the scent last longer

• Melt it fully, then turn it down. Use a high setting until the pool reaches the edges, then lower it. Gentler heat releases the scent more slowly.
• Use the timer. A few hours at a time is plenty. An auto off timer means the candle is never left melting in an empty room.
• Put the lid back on. Price’s Candles advises replacing the lid on jar candles after each use.
• Store it somewhere cool and dark. The same Price’s Candles guide warns that long exposure to sunlight fades colors and reduces scent, so keep spare candles away from windows.
• Keep it out of drafts. CandleScience notes that drafts change how strong a scent seems, so you end up turning the heat up to compensate.
• Rotate two or three scents. Switching gives your nose a break, so each candle smells fresh again when it comes back.

What to do with the wax when the scent is gone

What is left is plain wax with very little scent. To get it out, beauty brand Rituals suggests putting the jar in the freezer for a few hours or overnight, then letting the wax slide out or cutting it into chunks with a butter knife. They warn against using the microwave, which can make the candle smoke, and against putting a waxy jar in the dishwasher. If you use hot water on a glass jar instead, warm the glass first so it does not crack.

Then wash the jar and give it a second life as a holder for makeup brushes, cotton swabs, pens or a small plant.

Lamps with timers that help your candles last

Each of these has an auto off timer and adjustable brightness, so you control how much scent you use and when.

Frequently asked questions

How long does a candle last on a candle warmer?

There is no single number, because it depends on the candle, the fragrance, the setting and how many hours you run it. The wax itself is not used up, so the scent sets the limit. Many people find a candle lasts noticeably longer than when they burned it. One Apartment Therapy writer said a scent that used to last her a month stretched to over two and a half months.

Why doesn’t my candle smell anymore on the warmer?

Either most of the fragrance has left the wax, or your nose has simply gotten used to it. Turn the lamp up until the melt pool reaches the edges, step out of the room for a few minutes and come back. If it still smells faint, the candle is done.

Does a higher setting use up the scent faster?

Yes. More heat releases more fragrance right now, which leaves less for later. Use a high setting to get a full melt pool, then turn it down to keep the scent going gently.

Should I put the lid back on my candle?

Yes, once the wax has cooled. Candle maker Price’s Candles advises putting the lid back on jar candles after each use and storing candles in a cool, dark place away from windows.

What do I do with the wax when the scent is gone?

Put the jar in the freezer for a few hours or overnight, then pop the wax out or cut it into chunks with a butter knife. Do not use the microwave, and do not put a waxy jar in the dishwasher. Once it is clean, the jar makes a nice holder for brushes, cotton swabs or a small plant.

Sources