If the extensions are not sticking, you used too much hair in your strand. Gently brush some hair off the bottom extension.
If you plan to add extensions on the sides of your head, leave 1 inch (2. 5 cm) of hair out horizontally, closest to the ear, and then continue applying the extensions. If you have a thin hairline, leave about 1 inch (2. 5 cm) of hair out across your entire hairline before adding extensions, just to make sure that your hair has enough density to cover the tape-ins without making them noticeable.
If you plan to spend time in the pool or in the ocean, Hair Stylist Madeline Johnson notes, “I advise my clients to take a shower first so that the hair gets absorbed with clean water, and use a conditioner on your hair to protect it from the chemicals in the water or the salt so the hair doesn’t dry out fast or [get] discolored from the chlorine. "
Remember, hair care may take extra time when you’re wearing extensions. Synthetic extensions are more prone to tangling than human hair extensions.