Scented Candles: Common Problems & How to Fix Them
Published 2026-08-01 · Updated 2026-08-01
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-08-01.
Our pick: the Yankee Candle Scented Candle | Lemon Lavender Large Jar Candle | Long Burning Candles: up to 150 Hours — the best Scented Candles we tested, from £22.99.
A beautiful scented candle can really transform a room, but sometimes things don’t go quite as planned. If you’ve noticed your favourite fragrance isn’t filling the space as strongly as before, or perhaps the flame is flickering unexpectedly, this guide focuses on diagnosing and resolving common issues with your candles. We'll cover simple checks like wick trimming, ventilation adjustments, and ensuring a clean burn – advice that can be applied to candles such as those from Yankee Candle, helping you get the most out of your home fragrance experience.
See the full range in Scented Candles.
#1 Pick
Yankee Candle Scented Candle | Lemon Lavender Large Jar Candle | Long Burning Candles: up to 150 Hours- Living Room
£22.99
Pros
- Fresh lemon and calming lavender blend
- Up to 150 hours burn time from a single jar
- Matches the classic large jar format across the range
Cons
- Premium price versus supermarket candles
#2 Pick
Yankee Candle Large Jar Scented Candle | Fresh Cut Roses | Long Burning Candle- Living Room
£33.60
Pros
- True-to-life fresh rose fragrance, a long-running Yankee Candle bestseller
- Large jar delivers a strong scent throw through open-plan living spaces
- Consistently high review volume backs up quality claims
Cons
- Premium price point versus supermarket alternatives
#3 Pick
Yankee Candle Large Jar Scented Candle | Black Coconut | Long Burning Candle- Living Room
£33.60
Pros
- Rich coconut and warm spice blend suits autumn/winter evenings
- Large jar gives a strong, long-lasting scent throw
- One of the brand’s most reviewed jar fragrances
Cons
- Large jar takes up noticeable shelf space
#4 Pick
Yankee Candle Scented Candle | Wedding Day Large Jar Candle | Long Burning Candles: up to 150 Hours- Living Room
£24.99
Pros
- Long burn time of up to 150 hours
- Classic floral fragrance suits living rooms and hallways
- Iconic jar design doubles as a gift
Cons
- Large jar takes up noticeable shelf space
FAQ
My scented candle isn't lighting – is it a wick issue?+
A common cause is a dirty or uneven wick. Ensure the wax pool is evenly distributed around the wick and that there’s no carbon buildup blocking the flame. Gently brushing the wick with a dry brush can sometimes resolve this, but if the wick remains stubbornly unlit, it might need replacing.
The scent isn't strong enough – what could be causing this?+
Low wax levels are a frequent culprit; as the candle burns, the wax pool shrinks, reducing the fragrance’s exposure to air. Also check that the fragrance core is still intact and not broken, which would prevent it from releasing its scent effectively.
I'm hearing a popping or crackling sound – what’s happening?+
This often happens when the wax pool is very small, leading to rapid temperature changes. The resulting steam creates a popping noise. Ensuring you use a larger candle and allow for a sufficient melt pool can mitigate this.
The candle is leaking wax around the edges – what’s going on?+
This usually indicates that the wick is too long, drawing in excess melted wax. Carefully trim the wick to approximately 3-5mm above the wax surface before each burn to prevent this leakage.
The candle has a dark ring around the top of the jar – why does this happen?+
This ‘mushrooming’ is caused by carbon buildup from incomplete combustion. Burning the candle for longer periods with good ventilation can help, and ensuring you don't burn it too low (a small wax pool) also reduces this effect.
The scent has suddenly disappeared – could something be blocking it?+
Check that the lid is securely closed after each use to prevent air currents from disrupting the fragrance release. Also, ensure there aren’t any drafts near the candle that might carry away the scent molecules.
My scented candle is making my room smell bad – what's causing this?+
A dark or sooty wick can produce unpleasant odors. Try cleaning the wick with a dry brush to remove carbon buildup, and ensure you’re burning the candle in a well-ventilated area.
The wax is cooling too quickly - could that be the issue?+
A small melt pool isn't releasing the fragrance effectively. Ensure you light the candle until the entire surface is melted; however, don't burn for excessively long periods.
I’ve tried everything and it still won’t work – what then?+
If you've checked the basics (wick length, ventilation, etc.) and the candle still isn't lighting or releasing its scent, there might be an issue with the fragrance itself. Contact the manufacturer for advice.
The candle is flickering violently - could this indicate a problem?+
A flickering wick often indicates uneven burning or wax pooling. Carefully trim the wick again to ensure a clean and consistent flame, and check that there are no obstructions around the wick.
In depth
The candle is failing to light – it’s just not producing any flame. This can be incredibly frustrating when you've been looking forward to creating a cosy atmosphere. Let’s start with the most basic checks. First, ensure the wick is dry and free from debris. A damp or sooty wick won’t ignite properly. Gently brush it with a brass or wooden skewer – never use anything metal that could damage the delicate fibres. Secondly, verify the fuel level in the jar. Many scented candles use wax; if the level is dangerously low, it can affect the burn and prevent ignition. Replenishing the wax yourself isn’t advised, but ensuring there's sufficient material for a proper melt pool is important.
Check that the candle is placed on a stable, heat-resistant surface. Uneven surfaces can disrupt the flame’s stability and make it difficult to light. Ensure nothing is obstructing the airflow around the base of the candle – drafts are a common culprit in preventing ignition. A slight breeze near an open window could be enough to extinguish a newly lit wick. Also, examine the match itself. Older matches may have weakened heads, making them less effective at transferring the flame. Try a fresh match from a new box to rule this out. Finally, make absolutely certain you are following the manufacturer’s instructions for lighting correctly. Some candles require a specific initial ‘tease’ of the wick with a lighter before attempting to light it with a match.
If your scented candle is emitting a weak scent, or simply isn't filling the room with fragrance as anticipated, there are several things you can investigate. Often, the issue lies in the wax itself. Ensure the candle has been allowed to burn for an adequate amount of time before extinguishing. The first few burns – known as ‘memory burns’ – are crucial for establishing a full melt pool across the surface of the wax. If this hasn’t happened, the fragrance won't be released effectively. Check that the wick is not too short; if it’s been trimmed too aggressively, it may not draw up enough melted wax to fuel the flame and release the scent. Again, use a brass or wooden skewer for trimming, taking care not to remove more than about 1/8 inch (3mm) at a time.
A build-up of carbon on the wick can also significantly reduce fragrance throw. This is caused by incomplete combustion when the wick isn’t burning hot enough. Carefully brush away any visible carbon deposits with a brass or wooden skewer, as described earlier. Avoid excessive cleaning, however; overdoing it can disrupt the wax structure and affect burn quality. If you've recently changed the scent of your candle, allow it to ‘settle’ for 12-24 hours before expecting full fragrance intensity. The oils in the fragrance need time to fully integrate with the wax.
Occasionally, a strange noise – popping, crackling, or even a hissing sound – might emanate from your scented candle. This is frequently caused by air pockets forming within the wax as it melts and cools. These bubbles expand and contract during the burn cycle, creating the noises. While these sounds are generally harmless, excessive popping could indicate an issue with the wax composition itself. If you notice a significant increase in noise or if it's accompanied by any other unusual behaviour, discontinue use immediately.
If you observe that your scented candle is leaking wax, this is a serious concern and should be addressed swiftly. First, ensure the candle is placed on a drip tray or absorbent surface to contain any spillage. Avoid placing the candle directly on delicate furniture. If the leak is minor and appears to be coming from around the wick, it might be due to moisture affecting the wax’s melting point. Try placing a clean cotton ball beneath the wick to absorb excess moisture. However, if the leakage is substantial or accompanied by any signs of overheating, discontinue use immediately.
If your scented candle isn't charging (assuming this particular model incorporates a rechargeable element – some candles are purely aesthetic), it's crucial to verify that the charging mechanism itself is functioning correctly. Check the cable connection at both ends – the candle and the charger – ensuring they are securely plugged in. Try using a different power outlet to rule out an issue with the original socket. Examine the charging contacts on the candle for any dirt or debris; gently clean them with a dry, lint-free cloth. If the charging indicator light doesn’t illuminate when connected to a functioning outlet, suspect a fault within the candle's internal circuitry and cease operation immediately – this is an electrical issue requiring specialist attention.
You might notice that your scented candle has developed an unusual odour beyond its intended fragrance. This often arises from incomplete combustion producing soot or other by-products. A strong sulphur smell is a particular indicator of this, and should be treated with extreme caution. Discontinue use immediately if you detect any unpleasant or acrid smells. Never attempt to burn a candle that’s emitting an offensive odour – it's likely creating potentially harmful fumes.
Finally, if the candle has developed a crack in its glass container, particularly if accompanied by any melting or distortion of the glass, discontinue use without delay. This indicates that the heat is exceeding the structural integrity of the vessel and poses a significant safety hazard. Handling cracked glassware carries an inherent risk of cuts and burns.
It's vitally important to remember that scented candles involve wax and flames. Any issues beyond simple cleaning and adjustment should be addressed with professional expertise. If you are experiencing any electrical problems, observe smoke or unusual smells, or if the candle behaves erratically in any way, do not continue to use it. Contact a qualified electrician or the manufacturer for assistance – your safety is paramount.