I used to use the Rocket Blower and then Eclipse fluid. Now I use the blower and if that doesn't work, I use a
SensorKlear by LensPen. It is incredibly easy and it's okay to take it on an airplane (unlike Eclipse fluid.) I have never tried the brush method.
More about SensorKlear here:
http://www.lenspen.com/?cPath=1&prod...=SK-1&tpid=146
I also use the LensPens for cleaning all my lenses and my eyeglasses. I have several and I dedicate them to only one use. The one for my sensor looks different from the others so I never make the mistake of using it on a lens or anything else.