If you just put it in a washing machine, you run the risk of "fulling" the cashmere. Fulling is the technical term for sweater fuzz. A basket should help with this, but I'm not sure if it matters whether you have a front or top loader. Dryers should be avoided at all cost.
I wash my cashmere by hand, but only about once a year. I fill a sink with cold water, add Woolite, then put the sweater in and let it soak for about 30 minutes. I drain, then refill with clean water and gently press the sweater to squeeze out some of the detergent, then drain, refill, and soak.
Afterward, I let the sweaters drain in the sink for a while, then lay them flat on a towel, roll it up and stand on it to squeeze out as much of the water as possible. Then I lay flat on a dry towel and let dry.
It's not as labor intensive as it sounds, and my sweaters stay in like new condition.