Rub the runners of drawers and windows with paraffin wax or an old candle and they will slide more easily. This also works with sliding doors that are hard to open and shut or squeaky.
If your windows stick, all you have to do is to take a small paint brush and paint the window tracks with a thin coating of petroleum jelly, like Vaseline. The jelly doesn't freeze and your sticky windows will be cured.
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