How To Clean A Candle Jar And Remove Leftover Wax

When your favorite candle burns down to the bottom, throwing away that heavy glass jar feels like a waste. Whether you want to upcycle it for a craft project or recycle it properly, you need to get that stubborn wax out first.

I ran a candle business for three years, so I know a thing or two about wax consistency. The good news is that high-quality soy wax is easier to remove than paraffin, but these tricks work on almost any candle.

Keep reading to learn the easiest, mess-free ways to clean a candle jar so you can give it a second life.

Key Takeaways

• Freeze the wax: Place the candle in the freezer overnight to shrink the wax, allowing it to pop out easily with a butter knife.
• Use the hot water method: Pour boiling water into the jar to melt the wax so it floats to the top, cools, and hardens for easy removal.
• Clean the residue: Scrub the jar with warm, soapy water and use Goo Gone or oil to remove sticky label adhesive.
• Safety first: Never pour melted wax down the drain, as it will harden and clog your pipes.

In This Article

• Remove Wax from Candle Jar
• Remove Candle from Jar
• Clean a Candle Jar
• Reuse Candle Jars
• Reuse Old Candle Wax
• FAQs
• Ready to Upcycle?

How to Get Wax Out of a Candle Jar

Before you can repurpose a jar, you have to remove every bit of wax. It is normal to have about half an inch of wax left at the bottom; this safety feature prevents the glass from getting too hot and cracking.

Here are the most effective methods to remove that leftover wax.

The Freezer Method

Cold temperatures cause wax to shrink and pull away from the glass. This is often the cleanest method for removal.

Pop the candle in the freezer and leave it there overnight. When you take it out, the wax should be hard and slightly shrunken. Use a dull butter knife to gently pop the wax puck out of the jar. It often comes out in one satisfying piece.

Use your knife to pop the metal wick tab off the bottom. If there is sticky residue left, don’t panic. We will scrub that out later.

The Boiling Water Method

This technique uses heat to displace the wax. It is great for jars with narrow mouths where you can’t reach the bottom easily.

Boil water in a kettle or pot. Place your candle jar on a heat-safe surface, like a tea towel or trivet, and pour the boiling water into the jar. Leave about an inch of space at the top.

The boiling water will melt the wax, causing it to float to the surface. Let the jar sit until the water cools completely. The wax will harden into a disk at the top of the water. Simply fish it out and toss it in the trash.

Pour the water out (not down the drain if it still has wax flakes!) and wipe the inside with a paper towel.

The Oven Method

If you have multiple candles to clean at once, the oven is your best friend.

Preheat your oven to 200 degrees Fahrenheit. Line a baking sheet with aluminum foil or parchment paper to catch the mess. Place your candle jars upside down on the lined tray.

Let them sit in the oven for about 15 to 20 minutes. Gravity will do the work as the melting wax drips onto the foil. Once the jars are clear, use an oven mitt to remove them. While the glass is still warm, wipe the inside with a paper towel to remove residue.

Safety Warning

Glass can break due to thermal shock. Never put a cold jar directly into a hot oven, and handle the hot jars with thick oven mitts.

The Double Boiler Method

If you make your own candles or want to save the wax for wax melts, use a double boiler.

Fill a saucepan with water and bring it to a simmer. Place the glass candle jar directly into the water. Ensure the water level isn’t high enough to splash into the jar.

As the water heats the glass, the wax will melt. Once it is liquid, pour it into an old tin or the trash. Use a butter knife to pop the wick tab off the bottom while the glue is warm.

Fun Fact

This method mimics how professional candlemakers melt wax. It ensures the wax doesn’t burn or catch fire from direct heat.

Using a Hairdryer

You can spot-clean a jar using a hairdryer. This is great if you just need to soften the wax slightly to scrape it out.

Hold the jar with an oven mitt (glass gets hot fast). Aim the hairdryer at the sides and bottom of the jar on high heat. Once the edges of the wax soften, use a butter knife to loosen the chunk and dump it out.

Wipe the liquid residue away with a paper towel. Be careful not to blow air directly into the liquid wax, or it might splatter onto your clothes.

The Microwave Method

You have to be extremely careful with this method. Most candle wicks are attached with a metal tab. Metal causes sparks in the microwave, which can shatter the glass or start a fire.

Only use this method if you are 100% certain there is no metal in the jar.

If safe, place the jar in the microwave for 30 seconds at a time. Check it constantly. Once the wax melts, pour it into the trash. Do not let the wax get hotter than 170 degrees Fahrenheit, or the glass could crack.

Using a Heat Gun

A heat gun is like a hairdryer on steroids. It is powerful and fast.

Set the jar on a heat-resistant surface. Aim the heat gun at the outside of the jar to loosen the wax bond. Once the edges melt, the wax clump should slide right out.

Wipe the jar clean immediately. Always wear gloves, as a heat gun can make glass scorching hot in seconds.

The Spoon Method

If you don’t want to use heat or water, grab a sturdy spoon. This requires a bit of elbow grease.

Simply chip away at the soft wax with the spoon. This works best with softer waxes like soy or coconut blends. Avoid using sharp knives, as they can scratch the glass or snap and injure you.

Acetone or Nail Polish Remover

This isn’t for removing the bulk of the wax, but it is perfect for that last thin film of grease.

Soak a cotton ball or paper towel in acetone-based nail polish remover. Rub the inside of the jar. The acetone breaks down the oils and wax instantly, leaving sparkling glass behind.

How to Remove a Whole Candle From a Jar

Sometimes you buy a candle, and the scent just isn’t for you. You can remove the unburned candle intact and reuse the jar.

The freezer method is the champion here. However, this only works well for straight-sided jars. If the jar has a narrow neck (like some apothecary styles), the wax won’t slide out intact.

1. Place the unlit candle in the freezer for at least 4 hours, preferably overnight.
2. Remove it and turn the jar upside down.
3. Give the bottom of the jar a firm tap with the palm of your hand. The wax candle should slide right out.
4. If it sticks, use a butter knife to gently break the vacuum seal between the wax and the glass.

You can now wrap that wax in tissue paper to gift to a friend or place it in a wax warmer.

How to Clean a Candle Jar

Once the chunks of wax are gone, you are usually left with a greasy film and soot marks. Here is how to get that glass crystal clear.

• Time: 20 minutes
• Difficulty: Easy

What You’ll Need

• Hot water
• Dish soap (grease-fighting)
• Scrub sponge
• Dish towel
• Rubbing alcohol or vinegar
• Cooking oil or Goo Gone

1. Remove the Wick Tab

If the metal tab is still stuck to the bottom, it is likely glued down. Pour a little hot water over it to soften the glue, then pry it up with a spoon or butter knife.

2. Clean the Adhesive

There is usually a label on the jar and glue residue on the bottom. The best way to remove sticky glue is with oil.

Saturate the sticky spots with cooking oil (olive or vegetable) or a product like Goo Gone. Let it sit for 10 minutes. Scrub it with a sponge, and the glue will roll right off.

3. Wash With Hot Soapy Water

Fill the sink with hot water and plenty of dish soap. You need a soap that cuts through grease since wax is oil-based.

Scrub the inside of the jar thoroughly. If there are black soot marks near the rim, a little rubbing alcohol on a paper towel wipes them away instantly.

4. Dry Thoroughly

Dry the jar with a lint-free dish towel. If you let it air dry, you might get water spots. Your jar is now ready for its new life!

Top Ways to Reuse Candle Jars

A clean candle jar is basically a free storage container. Here are a few favorite ways to upcycle them.

• Planters: Glass jars make beautiful homes for succulents or propagating plants. Just remember to add rocks at the bottom for drainage since jars don’t have holes.
• Bathroom Organization: They are the perfect size for cotton balls, Q-tips, makeup brushes, or hair ties.
• Desk Storage: Keep your workspace tidy by using jars for pens, paperclips, or thumbtacks.
• Pantry Storage: If the jar has a lid, use it for loose-leaf tea, spices, or homemade salad dressings.
• Regifting: Fill the jar with candy, wrap a ribbon around the neck, and you have a cute, low-cost gift.
• New Candles: If you are feeling crafty, buy some soy wax and wicks to pour a brand new candle in your reclaimed vessel.

How to Reuse Old Candle Wax

Don’t toss those scraps of wax! If you save enough of them, you can create a “franken-candle.”

• Time: 1 hour
• Difficulty: Intermediate

What You’ll Need

• Old wax scraps
• Pre-tabbed wick
• Clothespin or pencil
• Clean jar
• Double boiler
• Hot glue gun

1. Prepare the Jar

Make sure your jar is clean and dry. Use a dab of hot glue to stick the metal wick tab to the center of the jar’s bottom.

2. Melt the Scraps

Place all your wax scraps into a double boiler. Melt them down slowly. Be aware that mixing different scents can result in some interesting (or funky) aromas.

3. Pour and Set

Once melted, carefully pour the wax into your prepared jar. Use a clothespin or wrap the wick around a pencil to keep it centered while the wax cools.

4. Trim the Wick

Let the candle cure overnight. Trim the wick to 1/4 inch before lighting it.

FAQs

Can I Put Candle Jars in the Dishwasher?

We do not recommend putting candle jars in the dishwasher if there is any wax left. Wax can melt, clog the dishwasher filter, and coat your other dishes in a waxy film. Only use the dishwasher once the jar is 100% free of wax residue.

Is It Safe to Pour Melted Wax Down the Drain?

No, absolutely not. Melted wax will cool and harden inside your pipes, causing severe clogs that are difficult and expensive to fix. Always pour excess wax into the trash or a disposable container.

How Do I Remove the Soot From the Rim of the Jar?

Soot is carbon buildup. The easiest way to remove it is by rubbing the black marks with a paper towel dipped in rubbing alcohol or vinegar. It comes off instantly without scrubbing.

Ready to Upcycle?

Now that you know how to clean a candle jar like a pro, you never have to throw one away again. Whether you choose the freezer method for a clean pop or the boiling water technique for stubborn residue, the process is simple.

Cleaning these jars saves money and reduces waste. So go ahead, grab that empty jar off the coffee table, and give it a brand new purpose.

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