If you find that your diffuser is evaporating too quickly, there may be a few reasons causing this issue. Firstly, check the quality of the reeds you are using to ensure that they are properly absorbing the oil. It is also essential to ensure that you are using an adequate number of reeds for the size of the bottle to facilitate a balanced rate of diffusion. Additionally, the diffuser's placement may also affect its evaporation rate by accelerating the process in areas with a lot of airflows.