Any cleaning advice?

Got a couple i need to clean.

Soak them in the coldest water you can produce, lots of ice!
Then dawn liquid soap, and liquid tide. Don't use warm water until you get the blood out. Works great on clothing too!

Soak in a tub with cool water. Leave it there for several hours (remove shoulder straps and hipbelt if possible before soaking). Use Downy (or a "Sport Wash" made for nylons) and a soft scrub brush to spot clean. Rinse thoroughly. If necessary, and only as a last resort, use "Shout" on stubborn spots. Scrub again with downy. Rinse thoroughly.

A pressure washer has worked great for me.

Dab with peroxide, then wash in cold water.

Bath tub it is...

Thanks Guys!

I take off the XPAC / Cuben bags on a paradox and throw them in the washing machine, then let dry a bit and they look like new.

jryoung has it right. I saturate the stained areas with hydrogen peroxide and lightly scrub with a course sponge. I then hand wash in cold water and again use the course sponge. Works on red wine stains as well.

Maybe you already washed it, but I've found MiraZyme really helps get the funk out. I use it for meat bags and backpacks both. It's the only non-corrosive product I've found that will kill the bear meat smell in a drybag. Other than that I soak like Brad does with a technical fabric cleaning agent.

With a removable pack (Barney's, DD shortbed), remove the pack and put it in a front loading wash machine on cold, double rinse, has always worked for me. Otherwise soak in cold water and spray it down on the driveway.

Be careful with that since it is easy to blow the inner coating off the nylon.