lol Dennis, nice one!
yeh it's dust on your chip. I had some on mine, and tried to clean it at Lostock. I hadn't used it since then until this morning, turns out I removed the ones that were there, but they've since been replaced with new/bigger/worse positioned ones.
So tonight it gets cleaned again.
No matter how many times I clean it, the ones I'm cleaning off always get replaced by new ones. I just have to hope the new ones are on the edge of the field of view.
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