"Lavender pillows are best changed once a year and cleaned once every three months. Good quality lavender pillows can be used for 2 to 3 years. Lavender pillows are generally best basked in the sun every three months, and it is best not to be exposed to the sun, which can play a role in disinfection and sterilization. In normal times, if there are many lumps on the lavender pillow, it means that it is wet. It is best to change the pillow immediately. "