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SlowbroBuy Techwash and TX Direct, run a cycle with Techwash, and then one with TX Direct after. Techwash cleans without damaging waterproofing, TX Direct restores water repellency (I think). You can rub undiluted Techwash into any stains with a cloth before running the cycle, it worked on getting rail stains out of my red pants.
Check your tags before but most tech stuff can go in the dryer after. I think it's actually recommended by most brands.