When extensions are applied, it takes some time to become familiar with new ways to brush and comb your hair from the extension bond to the ends of the hair instead of combing from the scalp out. Be patient, in a short time this action will become natural for you. During the first few days your hair may "hurt" a bit like when it does when we wera a ponytail. Actually, the extensions are ponytails, just very small ones. After the first few days this feeling subsides.
When washing the hair, always wash it in a downward motion. Do not mix it all together and create unnecessary tangles. Use your fingers in a horizontal motion between wefts to clean your scalp. When rinsing, do the same to be sure that all shampoo and conditioner residue are washed out. Also, do not pour your shampoo or conditioner onto the top of your head. You are adding unnecessary products directly to the bonds and letting it soak in. Pour into your hands and slowly work the right amount of product in.
Although the extension hair is real, it is not receiving nutrients from the scalp like your own hair. Using a good conditioner will help keep the hair silky. If your own hair is very fine I recommend you only use conditioner on the extention hair. To do this, pour a small amount of conditioner into your palm, spread to both palms by rubbing them together, then bend your head to the side, close palms together on both sides of the hair, and pull gently down to ends. Then take a comb and comb the conditioner through the extension hair.
When you dry your hair you will notice that the extension hair takes longer than your own hair to dry. Instead of using a lot of brush work while you dry it is better to turn your head upside down and dry the hair by just using the blowdryer, no brushing until the hair is 95% dry. If the hair is getting tangled, use your fingers to untangle it while you dry.