This Trisonic Laser Lens Cleaner is not only effective, but easy to use. It is essential to keep the Optical Laser Lens clean in order to have a clear picture and / or sound. This newly developed laser lens cleaner enables you to clean dirt and dust from the Lens. The 3 step process makes it fast and easy to use. Step 1- Apply 1 drop of cleaning fluid onto the Laser Lens Cleaning Brush. (For Wet Cleanings Only) Step 2- Insert the CD in to the device, and hit play. Step 3- Now just follow the voice guided instructions and you're done. (Special instructions for using it with your PC / MAC on Back Cover) The whole process takes under 5 minuets, and is recommended for every 20 hours of use. The Fluid lasts approximately for 50 cleanings, giving you approximately 1,000 hours worth of cleaning.