A burning smell from a heated styling tool has three common causes with very different levels of seriousness. Working out which one you have takes a few minutes and is worth doing before the next use rather than after.
- Device
- Straightener, curler or hot brush
- Time
- 15 minutes
- Tools
- Soft cloth, isopropyl alcohol
- Difficulty
- No disassembly
Cause one: product residue on the plates
This is the most common and the least alarming. Hairsprays, serums, oils and heat protectants leave a film on the plates or barrel. On the next heat-up that film scorches, producing a sharp smell and sometimes a wisp of smoke.
Residue also builds gradually enough that you will not notice the plates darkening. Look at them cold, under good light, against a white background — a brown or amber film is easy to see once you look for it and easy to miss otherwise.
- Let the tool cool completely Never clean a warm tool. Cold, unplugged, and left long enough that you are certain.
- Wipe with a soft cloth Slightly dampened with isopropyl alcohol, unless your manufacturer specifies otherwise. Do not use abrasives — the coating on ceramic and tourmaline plates is thin, and scratching it creates hot spots and snags hair.
- Work along the plate, not across the edges Edges are where coatings chip first.
- Let it dry fully before plugging in Alcohol evaporates quickly but not instantly.
Cause two: the hair itself
A brief smell of burnt hair during styling means the tool is too hot for that hair, or is dwelling too long in one place, or the hair is not fully dry. Water inside the shaft turns to steam against hot plates, which is both a smell and a mechanism of damage.
The response is to lower the setting, work in thinner sections so a single pass is enough, and make sure hair is fully dry first. The American Academy of Dermatology recommends the lowest effective heat setting and limiting how often heat tools touch hair — advice that addresses this directly.
Cause three: the tool
An electrical burning smell is different from scorched product or hair, and it matters. It tends to be sharper, more acrid, and it comes from the body or the cord rather than the plates. It may be accompanied by intermittent operation, discolouration around the cord entry, or a plug that feels hot.
Telling them apart
Product residue smells sweet or chemical and appears at heat-up, before the tool touches hair. Burnt hair smells unmistakably of hair and appears during a pass. An electrical fault smells acrid, appears at any point, and often comes with other symptoms — flickering indicators, a tool that cuts out, a warm plug.
If the smell survives a thorough cleaning and appears before the tool touches hair, treat it as electrical until proven otherwise.
Keeping it from coming back
Clean the plates after every few uses rather than when the smell arrives. Apply styling products to hair and let them dry before heat, rather than spraying onto hair that is about to meet hot plates. Store the tool with the cord loosely coiled rather than wound tightly around the barrel, which is what breaks conductors at the strain point over months.
Sources
- 10 hair care habits that can damage your hair — American Academy of Dermatology
- Tips for healthy hair — American Academy of Dermatology