Cleaning Silk Flowers?

I have some beautiful longstem and 5 inch Victorian silk flowers. I've had them for a long time and they're not only beautiful to look at, but they are soft to the touch also. Well, they used to be! They looked so dusty that without thinking I took them to the kitchen sink and pulled out my sprayer and sprayed them with some warm water.

Aaahhh! Too late. I just hung them upside down and hoped for the best. They look fine, but now they are not soft anymore. They feel cheaper and a little stiff and crunchy. Did I ruin them forever? Is there anything I can do to bring back the softness?

By Barb