good slurp

In the square in Portree is a bench that has its back right up against a low wall. On the bench people. On the wall a discarded can of fizzy orange. Loads of wasps. People oblivious - until they started wondering why the weirdo was taking pictures of the backs of their heads. They saw the wasps and the bench was empty.
This wasp is slurping away at the sugary fizz.
I tried to clean the mirror in my camera today and made it MUCH WORSE. I can't get it cleaned professionaly here on Skye. Any hints,or tips? H E L P. It is horrible. Looks like I used old dishwater mixed with the contents of a vacuum cleaner.