I have a Pro-Mist System. They recommend that you put them in an ultrasonic jewlery cleaner with CLR and it will make them look and work like brand new. You will need to soak them in Fresh water after you're done because CLR residue would be very harmful to your chameleon. I soak them, let them dry and soak them again before use. You need to remove just the misting head. Do NOT put plastic in the CLR.