Sensor cleaning products make lots of money for the manufacturers and sellers of sensor cleaning products. You can either invest a lot of time and money in these products, clean your sensor to within an inch of it's life, take a few shots and discover more spots on the sensor, get frustrated and invest more time and money in sensor cleaning, OR you can accept that sensor spots are an unavoidable part of digital photography, enjoy taking pictures and only deal with these spots when they become a big problem.
One of my brothers works for a large filming/ camera company and prepares movie cameras for major motion pictures. He rarely uses more than a loupe and a blower.