Avoid putting oil on the bonded part between your scalp and the extensions! This can weaken the bond and make your extensions fall out. [2] X Expert Source Gina AlmonaProfessional Hair Stylist Expert Interview. 12 December 2019. Hot oil treatments are easy to find at drug stores, beauty supply stores, and online. [3] X Research source

Look for paraben- and sulfate-free products since those are gentler on extensions. Don’t get any deep conditioner on the bonds of your extensions. [5] X Research source

Take your time as you brush through your extensions since the hair can get tangled really easily! Even rough brushing can cause knots. [9] X Research source To prevent tangling, try sleeping on a silk pillowcase at night. [10] X Research source If your synthetic extensions shed a lot when you brush them, it’s time for a replacement set. [11] X Research source

If you exercise a lot, wash synthetic extensions once a week or use dry shampoo in between washings to keep your extensions clean and bouncy. If you’re wearing clip-in extensions, remove them to wash them and hang them up to air-dry. [13] X Trustworthy Source American Academy of Dermatology Professional organization made of over 20,000 certified dermatologists Go to source

If you have heat-friendly synthetics, these can be gently styled with low heat to enhance the current style. You can’t change the overall style pattern of the hair, though. For example, you can’t flat iron curly extensions to make them straight, but you can flat iron straight extensions to make them look sleeker. These extensions will be marketed as heat-friendly, so check the packaging or manufacturer’s website if you aren’t sure what you have.

Rinse out the shampoo thoroughly! Residue can make your extensions look dull and lifeless. [16] X Research source If your extensions are synthetic, use shampoo formulated for synthetic hair. Boiling water shouldn’t damage synthetic hair the first time. Synthetic hair probably can’t withstand more than 1 boiling water treatment, though.

Washing individual wefts may seem time-consuming, but it ensures the hair gets squeaky clean and prevents knots and tangles.

Boiling water opens up the hair cuticle so the conditioner can soak in. For an extra dose of moisture, stir in 1 drop of silicone serum. If you don’t have serum on hand, add a few drops of a natural oil, like olive oil or coconut oil. [19] X Research source

If the water is still hot, use a spoon or tongs to grab the wefts and wear plastic gloves to handle them.

Hair masks are deep conditioning treatments that moisturize and repair your hair. You can get them at most drug stores and beauty supply stores. Look for masks with nourishing ingredients like vitamin E, Argan oil, keratin protein, B vitamins, coconut oil, and strengthening lipids. [23] X Research source

Never wring out your wet extensions! Always squeeze out the water and blot the hair gently with a towel to remove excess moisture. [25] X Research source Cold water closes the hair cuticle and locks in the moisture.

You’ll start noticing how effective this treatment is as you’re detangling the hair. It will feel much smoother and softer than it did before!

When the hair is totally dry, comb through each extension once more. Then, they’re ready to wear!

Don’t heat style synthetic extensions because the heat will damage them. Synthetics come permanently pre-styled, so you can’t change the style anyway. The only exception is if you have heat-friendly synthetics; those can be gently styled with low heat to enhance the style pattern. You can’t change the style pattern, though (for example, you can’t flat iron curly extensions to be straight. )[30] X Research source