Please follow for clean the Chemion hat;
Seperate the LED panel and battery which are fixed inside the hat with the hat. (You have to perfectly seperate them)
Clean the hat as normal wash way after seperating LED panel and battery.
Dry the hat for more than 2 days. (Should dry perfectly)
Put the Battery in the rubber band as its original state.
Push the LED panel in the LED entrance which can be seen left of the hat's inside.