4 CLEANING YOUR DSLR CAMERA SENSOR
If you start noticing dark spots in your pictures, then it is time you cleaned the sensor of your DSRL. Dust is a problem that affects DSLRs more as you keep changing the lenses. The best way to avoid dust is to change lenses only in closed rooms, away from wind and dust. But this is better said than done.
It can be a bit intimidating, but the sensor of the camera can be also cleaned. You will need a rocket blower to blow away loose specs of dust, then a sensor cleaning swab and solution that is recommended for your camera. There are many sensor cleaning kits with swabs that don’t damage the sensor. If your camera does not have a cleaning mode in the menu, select the Bulb mode and press the trigger to see the sensor – the sensor is not to be mistaken with the mirror before it. First use the blower to blow dust away and ensure that you don’t damage the sensor by rubbing particles on it while cleaning. Then gently move the swab from one side to the other, trying to reach the corners as you repeat the process. While repeating this process, make sure you are using a clean part of the swab each time. The sensor should be clean in four to five strokes. Repeat process if you still notice dust in pictures. Also, make sure you clean the camera only in dust-free environments.