I just cleaned my sensor with a cloth and when i test the dirt, I saw different dark spots on the image. What should i do? I've tried blowing with blower, but it didn't help.
This may not be dirt. You can have what is called a dead pixel on your sensor. Take a picture and load it onto your computer and zoom in all the way. If it's pure black and square, it's a dead pixel.
Also there are very particular ways to clean your sensor and using a regular cloth is not one of those ways. Check this video out for more info on how to correctly clean your image sensor: https://youtu.be/MufEqSA0PJI