For Dino-Lite AM Handheld Microscope series (not compatible with ZT models or AM4013MT) Proper installation of the diffuser: Place the diffuser into the clear plastic nozzle. Apply slight pressure until diffuser is secure. Please be caution of misaligned Led lights. Proper removal of the diffuser: Grip the clear plastic nozzle of the microscope with one hand and with the other hand gently twists and removes the diffuser.