How to Clean Your Camera Sensor
The above video from Lensrentals explains how to clean your sensor using several relatively simple tools. We suggest that you first watch the video and check if you have dust particles on your sensor (by shooting a test image of a white wall or a white paper in a closed aperture (f/16 or f/22) and if you do have visable particles go over the steps one by one.
Warning: improperly cleaning your sensor can damage the sensor (and effect your camera permanently) so do this only if you feel comfortable enough with the process – if not – take it to a good camera store of lab and ask that they will do this process for you.
Below is a video showing how to use wet cleaning to clean your sensor by Moose Peterson (using Copperhill products).