Went kiting after work today, kite is now washed and drying on the line. Tomorrow morning I will move it under the patio out of the sun where I have a similar set up. So maybe add another 30-60 seconds.
FYI I work as an efficiency expert so developing a process to efficiently wash kites isn't exactly a mental stretch.
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You left out: get it out of the bag, unroll, hang up, wash, dry, take it down, move it, hang it, take it down again, pack it into the bag, fit it into the car. Also the extra wear and tear and potential for damage caused by handling the kite 2-3 more times than is necessary. Not to mention doing direct damage by forcing water and salt and sand into seams and struts and stitching.
It's far better to learn to avoid doing damage and creating wear and tear in the first place.
It's also kind of dodgy to refer to yourself as an expert.