It was with great apprehension that I first purchased a LensPen SensorKlear.
This is a small, inexpensive and easy-to-use pen-shaped device with a shaped cleaning head that is not wet and does not dry out. The SensorKlear has a brush, but it is not recommended for the sensor. Why not make the brush a sensor brush? I don't know ... The brush is useful on other parts of the camera and lens that I wouldn't risk my sensor brush on. I simply rub the cleaning tip in a back and forth pattern over the sensor. You may need to do this a couple of times. I typically place the camera lens-mount-up on a safe, non-marring clean surface under very good light when using the LensPen SensorKlear. I can sometimes see the dirt on the sensor this way and can attack it directly with the SensorKlear. As usual, I use the air blower after cleaning with the SensorKlear and then promptly power-off the camera to close the mirror and shutter.
After many, many uses of this tool, I have no regrets. It is a very simple, small and inexpensive sensor cleaning solution. I have several in various places ready for use.