So, I pulled my ornaments down from the attic. I opened one box and found this:

It looks like something Tim Burton dreamed up!
It's supposed to be a snowflake, something I crocheted, um, a looong time ago. It has several companions, all equally warped. Clearly, these puppies got packed up in a hurry last year, rather than being lovingly placed between tissue paper for their yearlong nap.
So, I pulled out the iron & set it to cotton. I gave the snowflakes a blast of steam. And voila! They flattened right out & the latent starch reactivated, so they hold their shape.
This snowflake is much happier now:

Here's hoping all your crocheted snowflakes are just as happy!
Marcy