* Increased Damage: The heat from the straightener cooks the oil into your hair shaft. This can make your hair brittle, dry, and prone to breakage over time.
* Uneven Heating: Oil can cause the straightener to heat your hair unevenly, leading to inconsistent straightening and potential hot spots that can damage your hair.
* Sticky Residue: The oil can leave a sticky residue on the straightener plates, which can then transfer to your hair, making it look greasy and attract more dirt.
* Burning Smell: You might experience a burning smell as the oil heats up and potentially scorches.
* Risk of Frying: In extreme cases, if there's a significant amount of oil, the heat can essentially "fry" your hair.
What to do instead:
1. Assess the Oil Level:
* Slightly Oily: If your hair is only slightly oily, you might be able to get away with using a dry shampoo to absorb some of the oil before straightening.
* Visibly Oily: If your hair is visibly oily, it's best to wash it first.
2. Wash Your Hair:
* Use a shampoo that's appropriate for your hair type.
* Rinse thoroughly to remove all traces of shampoo.
* Consider using a clarifying shampoo if you're trying to remove built-up product and oil.
3. Dry Your Hair Completely:
* Air Dry: Allow your hair to air dry as much as possible.
* Blow Dry: If you need to blow dry, use a low heat setting and a heat protectant spray.
4. Apply Heat Protectant: Always use a heat protectant spray before straightening your hair, even if it's not oily. This will help to shield your hair from the damaging effects of the heat.
5. Straighten Clean, Dry Hair: Once your hair is clean, dry, and protected with heat protectant, you can proceed with straightening it.
In summary, it's always better to straighten clean, dry hair to minimize damage and achieve the best results. Avoid straightening oily hair to prevent potential damage and a less-than-ideal outcome.