They are very easy to apply with the use of a hair iron. You should remove the white plastic paper and attach the crystal to the desired strand of hair with a transparent paper. Then press it with a hair iron for about 6-7 seconds. Remove the transparent paper. The crystals last for 1-2 weeks after application. After that time, they will fall off during shampooing. If you want to remove them earlier, you can use alcohol or a remover (Solgel).
When wearing a zircon, you can regularly maintain and wash your hair.