Well, this is what it says in the manual of my Canon 6D:

Starting on page 283 of the 6D user's manual, there is a section on the Manual Sensor Cleaning. According to my Canon manual: "The surface of the sensor is extremely delicate." It states not to use a brush with the blower as a brush can scratch the sensor. It also clearly states not to use pressurized air. If the blower, used properly, doesn't remove the problem they recommend having it cleaned by Canon service center. Honestly, if my Camera needed the sensor cleaned I'd probably try to take it to an authorized Canon service center. If I did decide to attempt the cleaning myself, I'd use a cleaning system made for that purpose and nothing else. But that's just me. I have thousands tied up in my two DSLR cameras and if my manual suggests the sensor is "extremely delicate" I'm going the err on the side of caution and believe them.