To keep your Sleek Advanced diffuser performing at its best — especially when changing scents or if diffusion weakens — follow every six months:

1. Unscrew the used aroma oil bottle.
   
2. Clean it thoroughly with an appropriate amount of alcohol.
   
3. After cleaning, pour a small amount of alcohol into the bottle again, reattach it to the diffuser, and run it for 5–8 minutes.
   
4. Once cleaning is done, turn off the power.
   

Regular maintenance ensures consistent aroma diffusion and longevity of the device.