Make a bath for your hair extensions.
Put a teaspoon of moisturizing shampoo in about a half cup of lukewarm water and mix them together. When you're finished mixing, fill your sink with warm water and pour in the diluted shampoo.
Make sure to use sulfate-free shampoo.

Add your hair extensions
Slowly dip your extensions into the water. Comb through your extensions a few times before submerging them to get rid of any tangles. Let them soak for about ten minutes.
When detangling your extensions. Comb down from the end, then from the mid-length and finally all the way down from the roots.
Don't swirl your extensions in the water to get them clean. You'll only cause tangles to form.
Try your best to keep the top weft and the clips dry. The top wefts of your extensions can swell causing them to look uneven and the clips may rust.
Rinse your extensions
Gently take your extensions out of the sink and rinse them under the running faucet. Make sure the running water is cold so that it locks moisture in the extensions. Wring out any excess water and spread the extensions out flat on top of a fresh towel.

Condition the extensions
Apply some conditioner directly to your extensions. Comb the conditioner into them. Make sure to comb in the conditioner from the top weft of each extension down. Place the extensions back on the towel and fold it over. Let them sit for about an hour.
Make sure to only comb the hair in one direction at a time or it could lose its shape.
Never comb extensions that are soaking wet or they will become tangled.
Dry your extensions
Rinse the conditioner out of the hair. Apply a separate leave-in conditioner. Lay your extensions flat onto a new, dry towel and fold it over. Leave them to dry naturally overnight.
When your extensions are dry, comb through them one more time to straighten them out.
