I just did a quick test to see how dirty my sensor is... Wow.
Promptly ordered:
Photographic Solutions Sensor Swab Type 2 (12-Pack)
Visible Dust VDust Plus Formula Solution
Sure it cost $60 for these items and there is a big risk when cleaning the sensor, however my last sensor cleaning in Buffalo NY cost me $55. Sadly no one locally will clean one so this is pretty much my only option.