Finished these socks a couple of days ago. I have a couple of sweaters they’ll go with nicely so I decided they should live into my sock drawer.
When I went to put them on they were just a bit on the long side in the foot so I threw them into the wash with the other socks I’d worn last week. (BTW, I put all my socks into a mesh bag so they don’t get beaten about in the washing machine; and I DON’T put them in the dryer. I hang them over a rack to dry.)
The important thing to remember is to change the water temperature of the load you include them in to COOL, otherwise you run the risk of matting and shrinking the yarn if the water is too warm.
I’ve put a label on my washing machine “Remember To Change Water Temperature” in large letters to remind me to set the water temp to cool when I do a load that includes socks.
If all you have is a couple of pair of wool socks then I’d recommend washing them by hand, wringing them in a towel, and hanging them to air dry somewhere. They’ll last a lot longer that way.