1. Fit the refill into the spray head of the Perfume Case (Ref. 106).
2. Place the refill inside the Perfume Case with the spray head attached.
3.  Turn the Perfume Case clockwise to pull up the spray head. To pull it down, turn the Perfume Case anti-clockwise.
4. To change the refill, simply pull out the spray head and carefully remove the old fragrance. When putting in the new fragrance, don't forget to follow steps 1, 2 and 3 mentioned above.

It is very important that you follow these steps to ensure that the product works properly.