:annoyed::annoyed::annoyed::bang::bang::bang: :bang::annoyed::annoyed:
Is this mad enough for you! And I'm not a sweetheart. I eat children.
In your recently posted pics of that fizzy drink I can't see the hair at all, just some of the other dust and crap. I can say with 99.835% confidence that you have a hair. It's not a scratch shape, which would be more or less straight. I was about to say that you couldn't have scratched it if you haven't done a wet clean or tried to remove it by a similar dry method. But now you say you don't know what mirror lock up is, so I guess you've only been trying to clean the mirror? This is why we asked you to tell us exactly what you have done when you said you'd tried to clean it.
Find out how to carry out the sensor cleaning function (mirror locked up, shutter open and sensor visible). Then use your rocket blower on the sensor. If you want some links to videos for this process then ask and I/we will sort some out if you can't find any yourself. As well as the usual google for sensor cleaning supplies companies, you should find plenty on youtube.
When you eventually get to the point where you've got your sensor exposed, tried the blower, and it still hasn't worked, then we'll start talking about other methods. You can even borrow my useless Arctic Butterfly, and Visible Dust Sensor Loupe to look at the sensor if you want. But never, ever, touch the mirror.