What is the best way to clean silk blankets?

We purchased a silk blanket (cotton shell, silk inside) during a previous trip to China. I don't want to go into the details (but let's say it involves our cat....), but I need to clean it.

I've heard that the traditional method is just to put it in the sun for a day or two. That would likely help, but I want it cleaner. I assume putting it into a washing machine with normal water and soap will ruin it. Can it be dry cleaned?

Thanks.