What soap to use on filter sock?

[Gujustud]

I picked one up about 2 weeks ago, and ended up getting one more, mainly so I can switch back and forth when cleaning the other. Its made an amazing difference as before my sump held all the junk that got stuck down there. Now the sock holds it all.

But yes, cleaning is a problem. I try and clean it once every 3 days with a hot rinse of water. I was told by the new guy at OA (sorry don't know his name, and no its not James) that I could throw it in the washing machine with baking soda? Has anyone tried this? (i'm trying it as I type this).