How To Stop Aluminum Windows From Sweating?

I have an aluminum window on the back of my house. It is a sliding glass door, but has one pane that slides up and down to keep it from being cold in the winter. I also have two windows that are heat-insulated at least through winter months. They are not insulated at all during summer months, so they sweat inside if the temperature exceeds 75 degrees F for any length of time. Is there anything I can do about this? If this is an issue with only certain windows, then shouldn’t it be okay to leave them open without concern?

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