ecommendation:
Once in a while, flip the reed sticks over in the bottle.
The more often flipping of the reeds, the more fragrance is diffused.
Put fewer reeds into the bottle to decrease the strength of fragrance where the room is small.
Occasionally swirling the oil in the bottle to keep the ingredients blended.
The scent will spread better near the air flow, but the oil will be gone faster as well.