13CHAPTER 5CARING FOR YOUR CAMERAThe Retiga 4000R camera requires no regular maintenance except occasional external cleaning of theCCD window (the glass window between the camera sensor and the microscope or lens).To clean the CCD window:CAUTION — The camera’s CCD sensor, and circuits are sensitive to staticdischarge. Ensure you are using a static strap or are completelygrounded at all times to release any static energy before you clean theCCD window.• Use clean forced air (available at stores that sell cameras and computer cleaning supplies)to dust the CCD window.CAUTION — Do not use acetone.• If the image still appears dirty, gently wipe the face of the CCD window with a smallamount of optical grade isopropyl alchohol and lens paper.Apply forced air again to remove any loose particles.