Many of these myths were spread by camera manufacturers and repair companies who tried to create a cottage industry out of sensor cleaning. Over the last few years, it has become apparent that it is indeed quite possible to clean your own sensor and that it is, in fact quite difficult to damage sensors. The reason for this is that most, not all, DSLR sensors have what is know as a lowpass filter that sits over the sensor. Made of glass, this filter, is in fact pretty tough and the biggest issue that you are most likely to face is smears, not scratches.

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