Many people have their own opinions of how a Bamboo diffuser should be used, but always keep in mind the meaning of the term 'diffuse'. The oil has to be absorbed by the Bamboo and diffuse throughout its cellular structure so that the same oil can evaporate into the air in your home. If you use oil that is to high in molecular size to do this then you will have a serious problem in getting your Bamboo diffuser to work.