What's the best way to clean the sensor and the lens?

The sensor is a high precision component therefore we do not recommend you clean it yourself. If you insist on doing so, we suggest you purchase a sensor cleaner to clean off the dust and fibers from the lens. Cleaning lenses is best done with ethanol. First try blow off dust from the lens, then dip your lens cleaning cloth in ethanol and clean the lens in circular motion starting from the middle of the lens.