Rocky is the best to answer this question but this is what I do. Machine wash gentle cycle. Lay it flat to dry. I use a large beach towel on the floor in a room where no one is likely to bother it for a day. When laying it flat position all the pleats where they belong. Next day it should be dry.

I have also hung mine by positioning it along the bathtub curtain rod using multiple hangers but I think laying it flat works best as long as you take the time to position the pleats.

Mike