The problem stems form a few weeks back when I had a movie night with some mates, unfortunately more alcohol was consumed than should have been, which ended up in someone spilling Reef onto the lens (!!!). I managed to clean the foul sticky liquid off the lens with a lens cloth, luckily avoiding any serious damage, but ever since then i have noticed blurring of the outer edges of the image. When I look at the lens from an angle whilst the pj is running, i can notice what looks like a smear accross the front of the lens. The lens coating appears not to have been damaged, so i suspect the blurring is due to this smear, i've tried cleaning it off with a dry lens cloth (which the manual suggests) but to no avail. Does anyone have any suggestions how to properly clean the lens?