TIP 1: Though your clients probably have a shower at home full of hair products, make sure they only use products that have been recommended and approved by you, the stylist, to use on their extensions.
TIP 2: While a head scrub while shampooing might feel good, gentleness is best with extensions, so advise them to avoid excessive scrubbing.
TIP 3: Recommend that they dry their hair thoroughly and comb with a wide tooth comb or pick gently from ends to scalp. (This will help avoid tangling.)
TIP 4: If they want to change their hair even further by coloring, try offering highlights or lowlights with extensions.
TIP 5: Extensions are human hair, so overall; advise them to treat them as they would their natural hair. If they go swimming, advise them to wash out the chlorine with a proper after care shampoo and conditioner.