To adjust the intensity of the fragrance, all or just some of the bamboo sticks added, one or more times a day.
The duration of a fragrance depends on the size of the environment in which it is located, its temperature, direct sunlight and air currents that can accelerate evaporation.
However, there are a few tricks for far the longest fragrance:
the whole purchase of the diffuser combines a refill of the same fragrance to be used in small quantities, but with greater frequency. In this way it is possible to keep the level of the liquid always at the height of the bend avoiding that the quantity of oxygen in the bottle affects the evaporation speed too much keep the fragrance as far away as possible from heat sources
combine the whole area that wishes to perfume the most proportioned bottle size