From the manufacturer
Step by Step Instructions
Disposable Hygiene Filter should be in place to prevent musus or bacterial transfer.
Place large tube against child’s nostril (not inside), creating a seal.
Use red mouthpiece to suck out snot.
After SnotSucking session, dispose of filter.
Wash large tube with warm soap and water. Clean thin tube with a few drops of rubbing alcohol.
Firmly snap dry pieces together, inserting a new filter for next use.