There is a reduced amount of oil being diffused.

1. Check your essential oil bottles and make sure to replace empty bottles. 
2. Make sure the pickup tube is inserted all the way. Remove the atomizer from oil bottle and make sure the pickup tube is inserted correctly.
3. The atomizer or pickup tube may be blocked. Inspect the pickup tube and nozzle and use the Cleaning Solution to clean. Check out our How to clean your AromaTru page.