Blocking question

[ABC's Mom]

This is the first time I'll be blocking anything so not sure what the best way to do it.
One of the gals at my LYS uses a steam iron with the yarn a little damp and does it on the WS.
I've also seen it done by dampinging the whole thing and pinning to a towel.
The yarn is a worsted weight 100% wool that is hand washable only or dry clean.
I'm almost finished with my daughter's sweater, one sleeve to go, so will need to do this soon so I can finish by Christmas!!
Thanks in advance for your suggestions.

[suzeeq]

Rather than steaming it first, you'll want to wash it anyway - things pick up all sorts of stuff while we're making them, so you might as well clean it. Just hand wash, squeeze the excess water out by rolling in a towel, don't wring it. Then lay it flat to dry, patting into shape, you don't need to pin it.