Anyone who can't get steam to refresh their feathers simply isn't doing it right. I've been using that trick for many, many years and it has NEVER failed to work.

When you get out of the rain, put the arrow between your palms and briskly spin it back and forth to get the excess water out. Actually, I do that technique in tournaments when I have to shoot in the rain, to get out the excess water and make the feathers stand up better. Anyway, after you've done each wet arrow that way, stand them up to dry overnight.

Then run the feathers through steam. Best is through the steam coming from the spout of a tea kettle because you can direct the steam right where you want it, but holding them over a pot of rapidly boiling water will work fine. It'll just take a little longer. When the steam hits them, they zip right back into shape just like brand new.

But it's best to keep them dry and I don't like relying solely on waterproofing. Waterproofing agents aren't 100% effective. A smart hunter carries a plastic bag, like a gallon size freezer bag or maybe a small trash bag, to put over his feathers and keep them dry. Don't take out an arrow until you're ready to nock it and shoot.

Waterproofers will protect the feathers for that minute or two before the shot pretty easily, maybe even an hour if it's just a light drizzle, but you can't expect them to last all day.

I use Scotchguard spray for waterproofing. Or the cheapest hairspray I can find, usually White Rain.