I use regular, fragrance free detergent with wool. Wool gets washed in cold water, hung to dry. The really delicate things get put in the lingerie bag, i.e. Ibex boxers, Smart wool thin base layers. Socks, too, but only so they don't get lost.
I've been wearing wool socks for about 2 weeks now, even up to 70 degrees, or a little more.