Sensor cleaning is a relatively straight-forward procedure, but can be a little daunting if you are unfamiliar with the process. The easiest way to find out if you need to clean your sensor is to use a magnifying loupe, which will enable you to clearly see any contamination on the sensor and within the chamber area itself. Alternatively, you can take a test shot and examine it for debris in Photoshop.
If you do find dirt on the sensor, there are two ways to clean a camera's sensor: dry cleaning and wet cleaning.
When you get a contamination on your sensor, 99 times out of 100 it is going to be a dry dust contamination, in which case a dry clean using a sensor brush like the Arctic Butterfly is an ideal solution.
On the other hand, depending on the type of camera you have and your vigilance while changing lenses and cleaning, you may get a stain on your sensor. In these cases we recommend that you use a swab and liquid combination to remove the stain, and then follow it up with a dry clean.
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