Cloudy Aquarium Glass After cleaning

This is my 55 gallon tank. It was just used for fish but I am now trying to sell it. I noticed once I brought it outside that the glass was extremely cloudy. I tried to scrub the glass with a non abrasive sponge and some white distilled vinegar but that didn’t work. I’m afraid I have no idea how

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Cloudy-green water issues.. please help! I've tried water changes, low lighting, filter cleaning, Anti algae treatment and water clarifiers. Nothing seems to help. Any suggestions? : r/Cichlid

The regular water change

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White Cloudy Thing On Aquarium Glass

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