Flapping Don't allow your kite to flap too much in the wind. Flapping is one of the main causes of wear and tear of the sail. It damages the coating on the sail and between the fibres. This makes your kite limp and more vulnerable.
UV-radiation Kite-Refit Coating offers increased protection against UV. Try to minimise your kite's exposure to UV-radiation. This is easier said than done, of course. Do not leave it lying around unnecessarily in the sun in any case.
Rinsing Salt water can damage your sail. The salt crystals attract moisture and dirt. They are also very sharp. Make sure you rinse off your kite with running water, especially after use in a salt-water environment. Kite-Refit Coating limits the damage that salt can do to your kite.
Sand Is there sand on the kite? Do not rub it off with your hand, wait until it has dried up and shake it off. Better still is to rinse off the sand with clean running water. As the kite will no longer retain water after having been treated with Kite-Refit Coating, the sand will also tend to stick less to your kite.