How do you fluff your pom poms for cheer?

Generally pom pons do not need to be cleaned. If your squad shares poms and you are worried about spreading germs, you can always Lysol them 24 hours before they need to be used. Make sure if you do this, though, that you give them plenty of space to air out. If it's actual dirt on the poms, a wet rag down the streamers will work just fine.