
Repurposing candle jars is a great way to reduce waste and save money. Instead of throwing away the glass candle jar, you can give it a second life by remelting the wax and reusing the jar. This guide will teach you how to safely and effectively melt the wax in your glass candle jars and prepare them for their next use. You will need items such as a butter knife or spoon, boiling water, dish soap, and a sponge. Follow these steps to ensure you get every last bit of candle wax out, leaving your jars clean and ready for their new purpose.
| Characteristics | Values |
|---|---|
| Purpose | To reduce waste and repurpose candle jars |
| Tools | Butter knife or spoon, boiling water, dish soap, sponge, rubbing alcohol or vinegar |
| Steps | Use a butter knife or spoon to gently remove large wax chunks, pour boiling water into the jar, scrub with dish soap, rinse with warm water, and dry |
| Glass Type | Heat-resistant glass like borosilicate glass, thick glass, or frosted glass |
| Oven Method | Preheat oven to a low temperature (150-170°F/65-75°C), place the jar on a baking tray, melt wax for 10-15 minutes, remove jar with oven mitts, and repurpose melted wax |
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What You'll Learn

Use a butter knife or spoon to gently remove large wax chunks
To remelt a jar candle, you'll need to start by removing the leftover wax chunks. This can be done gently with a butter knife or spoon. Be careful to not scratch the glass jar. You'll want to remove as much of the solid wax as possible before moving on to the next step.
The next step is to melt the remaining wax. This can be done by pouring boiling water into the jar, being sure to leave some space at the top. Alternatively, you can use the oven method, which involves placing the jar on a baking tray lined with aluminium foil to catch any wax overflow and then putting it in the oven at a low temperature, between 150°F and 170°F (65°C to 75°C), for 10 to 15 minutes. Keep a close eye on it to avoid overheating, as higher temperatures may cause the glass to crack.
Once the wax has melted, you can pour it into a mould or another container for reuse. If you're planning to reuse the jar, be sure to rinse it thoroughly with warm water to remove any soap or alcohol residue. Dry it with a clean towel or let it air dry. Now your jar is ready for its next use!
Remember to always use heat-resistant glass jars, such as those made of borosilicate glass, to avoid thermal shock, which is when glass cracks under sudden temperature changes. Thick glass candle jars or reinforced glass candle holders can also provide better heat insulation and withstand high heat.
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Pour boiling water into the jar to melt remaining wax
One of the easiest ways to remelt a jar candle is by using boiling water. This method is efficient and eco-friendly, and it saves you from potentially damaging the jar with scrapers. It is also a cost-effective way to clean your candle jars and prepare them for reuse.
First, use a butter knife or spoon to gently pry out and remove the larger chunks of leftover wax. Be gentle to avoid scratching the glass jar. Then, wearing oven mitts or using a towel to protect your hands, carefully pour boiling water into the candle jar, filling it almost to the top. The hot water will melt the residual wax, causing it to float to the surface as it cools.
Allow the jar to sit for several minutes. As the water cools, the wax will solidify and float to the top, forming a layer. Once the wax has solidified, you can easily pick it out with your fingers or a spoon. If there is still some wax residue on the sides of the jar, you can scrape it off with a knife or repeat the boiling water process.
Finally, empty the water from the jar and wipe it down with paper towels or a cloth to remove any remaining wax or soot. If you want to repurpose the jar, wash it with soap and water to ensure it is completely clean.
Using boiling water is a simple and effective way to remelt your jar candles and prepare them for a new purpose. It is important to be cautious when handling boiling water and to ensure that you protect your hands during the process.
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Clean the jar with dish soap and a sponge
Once you have removed the wax from your jar candle, it's time to clean the jar with dish soap and a sponge. This step will ensure your jar is sparkling clean and ready for its next use.
First, fill your sink with hot water and add a few squirts of dish soap. Submerge the sponge in the soapy water and let it absorb the soap. Then, squeeze the sponge to create a lather. If your jar candle had a label, you may need to use a butter knife to gently scrape off any remaining adhesive before proceeding with the cleaning.
Next, use the sponge to scrub the inside and outside of the jar. Pay extra attention to the areas where the wax was previously stuck to the jar, as these areas may have a buildup of residue. Use circular motions with light pressure to avoid scratching the glass. Ensure you scrub the jar's base and any ridges or grooves thoroughly, as these areas can be difficult to clean.
Rinse the jar with warm water to remove any soap suds and ensure that all the dish soap has been washed away. If there is any stubborn sticky residue remaining, you can use a cotton ball dabbed in rubbing alcohol or vinegar to remove it.
Finally, dry the jar with a clean towel or let it air dry. Once the jar is dry, inspect it to ensure it is clean and clear of any wax residue or soap streaks. If there are any remaining traces of wax or soap, repeat the cleaning process as needed until the jar is spotless.
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Use rubbing alcohol or vinegar to remove stubborn residue
After removing the wax from your candle jar, you may still find some sticky residue or labels stuck to the glass. This is where rubbing alcohol or vinegar comes into play. Both substances are excellent for dissolving stubborn wax residue and removing any lingering stickiness.
For a simple and eco-friendly method, you can use rubbing alcohol. First, let the jar soak in warm, soapy water for a few minutes to loosen any stubborn residue. Then, gently scrub the inside of the jar with a sponge, soft cloth, or bottle brush, making sure to clean the rim and outside of the jar as well. Rinse the jar with warm water to remove any soap residue. If there are still bits of wax or soot, repeat the process. To remove tough spots, apply a small amount of rubbing alcohol to a cloth or cotton pad and gently rub the affected area. Let the alcohol sit for a minute or two before wiping it away. Finally, rinse the jar with warm water and dry it with a clean towel or let it air dry.
Alternatively, you can use vinegar to remove stubborn residue. Create a vinegar solution by mixing equal parts vinegar and water. Soak a cloth, cotton pad, or cotton ball in the vinegar solution and gently rub it on the affected area. The natural acidity of vinegar will break down wax particles, making it easy to wipe away any remaining residue. You can also use a mix of baking soda and cooking oil to form a paste. Apply the paste to the label or residue and leave it for a few minutes before removing it by scrubbing.
Both rubbing alcohol and vinegar are effective ways to remove stubborn residue from your candle jar, leaving it clean and ready for its next use.
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Use an oven to melt wax slowly and evenly
Using an oven to melt wax slowly and evenly is one of the most effective and safe ways to remould a jar candle. This method allows the wax to melt slowly and evenly without overheating the glass. Here is a step-by-step guide for melting wax in a jar candle using an oven:
Preheat the oven
Set your oven to a low temperature, ideally between 150°F and 170°F (65°C to 75°C). Higher temperatures may cause the glass to crack.
Prepare the jar
Place your glass jar on a baking tray lined with aluminium foil. This will catch any wax that might overflow. Remove any labels or stickers from the jar.
Melt the wax
Place the tray with the jar in the oven and let the wax melt for 10 to 15 minutes. Keep a close eye on it to avoid overheating.
Remove the jar
Once the wax has melted, carefully remove the jar from the oven using oven mitts. Handle the jar with care as it will be hot.
Reuse or repurpose the wax
You can now pour the melted wax into a mould or another container for reuse. You can use the wax to make new candles, wax melts, or even homemade fire starters.
It is important to note that this method is for melting wax in a glass jar candle. If you are using a different type of container, such as a metal tin, you may need to adjust the temperature or timing accordingly. Always exercise caution when working with hot wax and heated glass to prevent injuries.
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Frequently asked questions
Remelting a jar candle can reduce waste and minimise your environmental footprint. It can also save you money, especially if you frequently use candles.
It is important to use a jar made from heat-resistant glass, designed for high temperatures. Borosilicate glass is ideal as it is durable and less prone to thermal shock. Thick glass candle jars are often used in premium candle brands as they offer excellent durability and better heat insulation.
You will need a butter knife or spoon to gently remove large wax chunks, boiling water to melt the remaining wax, dish soap and a sponge to clean the jar, and rubbing alcohol or vinegar to remove any stubborn residue.
Preheat your oven to a low temperature, between 150°F and 170°F (65°C to 75°C). Place your glass jar on a baking tray lined with aluminium foil to catch any wax overflow. Put the tray in the oven and let the wax melt for 10 to 15 minutes. Remove the jar from the oven using oven mitts and pour the melted wax into a mould or another container.
Rinse the jar thoroughly with warm water to remove any soap or alcohol residue, then dry it with a clean towel or let it air dry. You can now use the jar to make your own candles.











































