<human>:  How can I repair a stuck window handle?
<bot>: Try using a flathead screwdriver to loosen the screws around the window handle. Then, use a lubricant to lubricate the moving parts of the handle and try to open it again. If the handle is still stuck, try gently tapping it with a hammer and prying it upward. If all else fails, you may need to replace the handle entirely.