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How to Care for & Maintain Your Candles & Diffusers

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.

How we choose products

Our pick: the Air Wick Plug in Diffuser Refill, Mulled Wine, Pack of 6 x 19ml, Long Lasting Fragrance, Lasts up to 600 Days — the best Candles & Diffusers we tested, from £3.75.

Once you’ve brought home the perfect scented candle or diffuser – perhaps an Air Wick plug-in refill, a Yankee Candle jar, or even a set of aromatherapy candles – ensuring its longevity and continued fragrance enjoyment is key. Proper care and storage will help preserve the quality of your chosen product and keep your home smelling wonderful for longer. Following simple maintenance steps after purchase can make a real difference to how long you get to enjoy those beautiful scents.

See the full range in Candles & Diffusers.

£3.75

Pros

  • Pack of 6 refills lasts up to 600 days in total
  • Flame-free, safe for continuous background fragrance
  • Trusted supermarket brand, widely available refills

Cons

  • Requires a separate Air Wick plug-in unit
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£22.88

Pros

  • Long burn time of up to 150 hours
  • Warm sandalwood, amber and vanilla scent suits autumn/winter
  • Classic glass jar with removable label

Cons

  • Large jar candle is heavier and bulkier to store
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Yankee Candle Large Jar Scented Candle, Driftwood, Up to 150 Hour Burn Time
Best Value

#3 Pick

Yankee Candle Large Jar Scented Candle, Driftwood, Up to 150 Hour Burn Time
Rated 4.7 out of 5 stars (2,456)
  • Ambient Fragrance

£14.99

Pros

  • Up to 150 hours burn time from a single jar
  • Trusted brand with consistent, strong scent throw
  • Warm woody driftwood scent suits living rooms and hallways

Cons

  • Higher price than own-brand jar candles
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Pros

  • 4 scents in one set — vanilla, rose, orange, lemon
  • 100% natural soy wax burns cleanly
  • Great value gift set for birthdays or Christmas

Cons

  • Individual burn time shorter than larger single candles
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FAQ

How often should I be cleaning my candles and diffusers after use?+

Regular maintenance is key to preventing build-up. After each burn, wipe down the exterior of your candle with a soft cloth – this removes wax drips and prevents residue from hardening. For diffusers, gently clean the glass reservoir weekly with warm water.

What’s the best way to remove stubborn wax or oil stains?+

For minor wax build-up, use a cotton bud dipped in a small amount of isopropyl alcohol – *always* test on an inconspicuous area first. For more significant oil stains from diffusers, a microfiber cloth dampened with mild soapy water can be effective; follow manufacturer’s cleaning instructions.

How should I store my candles and diffusers when not in use?+

Store your candles in a cool, dry place away from direct sunlight. Diffusers should also be kept in a cool environment to prevent the oils from degrading quickly. Consider using an airtight container for added protection against humidity.

What can I do to prevent damp or condensation damage?+

Excessive moisture is detrimental to both candles and diffusers. Ensure your storage area has adequate ventilation, and avoid storing them in areas prone to dampness like a bathroom. Regularly check for signs of condensation.

I've noticed some grey staining on my diffuser – what’s causing this?+

Grey staining often results from the degradation of essential oils over time, particularly if exposed to light or heat. To address this, carefully clean the reservoir with warm water and a soft cloth; replace the oil regularly for best performance.

My candle wick is getting brittle – what can I do?+

A brittle wick indicates it's been subjected to frequent use or exposure to heat. Trim the wick to approximately 3mm before each burn, and consider using a wick trimmer for a clean cut; always follow manufacturer’s instructions.

I’ve accidentally knocked over my diffuser – is there anything I can do?+

Immediately switch off the diffuser. Carefully wipe up any spilled oil with a lint-free cloth, and thoroughly clean the reservoir as per the manufacturer's cleaning guide. Minor damage might be repairable but significant issues warrant professional attention.

How do I spot wear and tear on my candles or diffusers?+

Inspect your items regularly for cracks in the vessel, loose components, or discoloration of the glass/plastic. Significant wear may impact performance, and replacement might be necessary rather than attempting a DIY repair.

What’s the best way to clean candle jars after they've been used?+

After cooling completely, gently wipe out any residual wax with a soft cloth or sponge. Avoid using abrasive cleaners that could damage the glass – if necessary, consult manufacturer instructions for appropriate cleaning agents.

Can I use household products to clean my candles and diffusers?+

While some gentle cleaning methods are acceptable, avoid harsh chemicals like bleach or strong solvents. These can damage the materials. Always test any product on a small, hidden area first, and adhere strictly to manufacturer’s recommended cleaning procedures.

In depth

Maintaining your candles and diffusers ensures they continue to provide fragrance and ambience for as long as possible, while also protecting surfaces from potential damage. Regular care, even after just a few uses, can significantly extend their lifespan and prevent issues arising from neglected materials. Following simple routines will safeguard both the product itself and the areas around it.

After each use, allow the wax to burn down completely before extinguishing the candle. This ‘dunking’ method – fully consuming the wax pool – is generally considered best practice for most candles as it reduces soot production and prevents overheating of the container, which can be a factor with some materials like ceramic or glass. For diffusers, simply turn off the device and unplug it when not in use. Regularly check the water level in reed diffusers; maintaining this at the recommended line ensures optimal fragrance dispersion and prevents the reeds from drying out completely, leading to diminished scent throw.

Deep cleaning of candles and diffusers should be undertaken periodically, depending on usage frequency and the materials involved. For wax containers – typically made of glass, ceramic or metal – a gentle dry cloth is usually sufficient for daily maintenance. However, if visible residue builds up, you can carefully wipe down the interior surfaces with a soft, lint-free cloth dampened *very* lightly with distilled water. Avoid abrasive cleaners or scrubbing pads, as these could scratch delicate surfaces. For reed diffusers, gently shake the bottle to redistribute the fragrance oil and ensure even distribution. Periodically, replace the reeds themselves – typically every 1-3 months depending on environmental conditions, as they can become saturated and lose their ability to wick the fragrance effectively.

Regarding storage, protection from extreme temperatures is key. Avoid storing candles or diffusers in direct sunlight or near heat sources such as radiators or fireplaces. These extremes can cause wax expansion and damage delicate components. Similarly, keep them away from cold drafts, particularly during the winter months when condensation can form on surfaces, leading to dampness and potential mould growth. For outdoor reed diffusers, especially those used during summer, it’s vital to store them indoors after use to prevent water ingress and subsequent damage to the reeds and fragrance oil.

A common mistake is attempting to ‘clean’ heavily soiled wax containers with aggressive methods. Using harsh chemicals or abrasive cleaners can permanently damage many container materials, leading to etching, discoloration, or even structural weaknesses. Another frequent issue arises from burning candles for excessive lengths of time without allowing them to burn down completely; this significantly increases the risk of overheating and potential cracking, especially in ceramic or glass containers. Similarly, leaving reed diffusers running continuously for extended periods can saturate the reeds beyond their capacity, resulting in a stale scent and premature wear.

Pay close attention to any visual signs that indicate a problem requiring professional intervention rather than further cleaning. Cracks or chips in wax containers are often indicative of thermal stress and may signal underlying structural damage. Excessive smoking or soot build-up is usually a symptom of improper burning techniques, but if it persists despite following standard practices, the wick might be damaged or the candle’s design isn't conducive to clean burning. If you notice significant discoloration or staining on diffuser components, this could indicate chemical reactions within the fragrance oil that are difficult to resolve without specialist knowledge.

In some cases, a professional service may be worthwhile – particularly for complex ceramic or glass containers with intricate designs, or for heavily damaged reed diffusers where repair is unlikely. However, for most routine maintenance tasks and minor issues, DIY solutions are often effective. If you're uncertain about any aspect of care or cleaning, it’s always best to err on the side of caution and consult a specialist.

Regularly inspect your candles and diffusers for signs of deterioration – wobbly bases, leaking components, or damaged reeds. Addressing these issues promptly can prevent them from escalating into more serious problems. Remember that material properties vary considerably; porous ceramics are more susceptible to moisture damage than robust metal containers. Consider the environment in which you’re using the product too - higher humidity environments will accelerate deterioration rates.

Finally, it is absolutely crucial to always consult and strictly adhere to the specific care instructions provided by the manufacturer of your particular candles or diffusers. These instructions represent the best guidance for maintaining the longevity and performance of that specific product, taking into account its unique materials and design. They may outline precise temperature limitations, recommended burn times, or specific cleaning protocols not covered here.