Gamma Optical Cleaning Fluid is the best sensor cleaning fluid on the market. Gamma Optical Cleaning Fluid is based on the chemical, methanol, which has been used since the conception of sensor cleaning. When used in an appropriate amount/volume, it will evaporate as quickly as it is applied, leaving clean optics and no residue. Use with Alpha Premium Sensor Cleaning Swabs for cleaning your CMOS or CCD sensor. When cleaning a sensor, more isnt always better. Placing too much cleaner on your swab will cause unwanted results, therefore only 2 or 3 drops on the tip of the swab will suffice for favorable results. With over 20 years’ experience of teaching sensor cleaning to consumers, we have found that using too much cleaner is the #1 reason why they weren’t successful in the past. Not only is Gamma Optical Cleaning Fluid effective on sensors, its well suited for all optics. Use with Delta Optical Cleaning Wipes for cleaning your lens optics.