City Lights

The City from across the bay. Realised when I got home my sensor must be dirty, as there are specs everywhere! Grrr! So annoying, more noticeable in some than others but definitely there. Had thought it was on the front filter so made sure that was clean this afternoon, but must be the sensor. Can't see anything on it and not sure weather to clean it myself or take it into town for the pros to do.