Toss in the wash with cold water. Air dry. Boom.
My favorite Rothy's
"I have several Rothy's but by far these are my favorite. These are amazingly comfortable and adorable! The wide toe box makes them comfortable for lots of walking and the revelvet gives them a hint more dressiness than the standard Rothy. I have a narrow heel and they fit well with no slipping. I did find them a bit short. I'm usually a 7 - 7.5 and got an 8. Seriously considering more colors."