Same issue. 2010 Half Dome 2+. Has worked flawlessly for 9 years. Then a month ago went camping to find out the rain fly had totally failed. Thought I made a mistake setting it up first, then realized the rainfly had gone bad. Slept with a hoodie over my face at night as I felt like I had learned enough about what waterboarding might feel like after about 10 minutes. So I guess I'm going to go down this repair rabbit hole against my better judgement (3 young children and both mom and dad work full time in public ed so time is not a commodity I have a lot of...) @xleafr can you tell me more about the vinegar rinse (i.e. rough proportions, how long it soaked, did you hand wash some or just soak, etc)? Also, when you ran it through the washing machine did you use any detergent or vinegar solution? I'm going to go this route and set the washer to the "hand wash" setting with a deep water rinse. Just wondering if I should put anything in after the vinegar soak. @REI-JohnJ another plug here for being able to buy a replacement fly in the future as my tent and footprint are still in perfect working condition. Regardless, appreciate the discussion here.
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