u/DellLatitudeE7250

Hi, I recently got 3 telephoto zoom lens for my personal project, and I came across this glass problem. This seems to be not dust at all since it is like stuck or rot on glass and doesn't look like fungus either. Does anyone have an idea about these "dots"? Many thanks
Also I found there is haze on the zoom elements on at least 2 lenses, what is the cause of that and how can I remove that?