How do I replace my sponge filter? Customer Support October 18, 2017 20:49 Updated Follow Detach the water tank by turning it counter-clockwise Remove plastic cover containing the sponge filter by pulling the cap off Replace with a newly soaked sponge filter Put the cap back on and attach the tank back on the diffuser Related articles How do I use essential oils on my diffuser bracelet? How do I clean my In-Car Essential Oil Diffuser? How do I use a carrier oil to dilute my essential oils? How do I use my essential oils? Help! What do I do if my In-Car Essential Oil Diffuser is not working? Comments 0 comments Please sign in to leave a comment.