In your XL diffuser, mix 3 rattan sticks and 3 fibre sticks (1 of each size) to ensure controlled diffusion, fibre diffusing more than rattan.
Once your diffuser is completely burnt out, start by removing the wooden cap by gently lifting it over the sticks and replacing your refill of fragrance liquid and your set of 6 sticks.
When refilling, be careful not to spill any fragrance on the cap, as this could damage it. However, if this happens, it is recommended to use beeswax to revive and protect it.