How to unwrinkle sweaters?

[kenberman]

so, it's apparently now winter time here in Boston. I pulled out all the wool sweaters out of my closet this weekend, but all of them were hopeleslly wrinkled. (that's what happens when they are balled up together for 9 months).

anybody know how I can remedy this situation? I suppose I could get them all drycleaned, but is that the only solution?