Toss in the wash with cold water. Air dry. Boom.
Heel blisters within an hour
"I bought 4 pairs of D’Orsays during the final sale. I haven’t worn all 4 pairs yet, but the red pair gave me blisters right away. I’m a collector of the original Point owning around 15 pairs in all the different colors, Those never hurt my feet. The Point II destroys my heels, so I can no longer wear my favorite style shoe. Sadly, Rothy’s has received this feedback from many customers, yet they continue to use the same stiff heel cup material. No idea why they won’t revert that back to the original. I love the style and will use moleskin tape to protect my heels and see if they soften. Rothy’s said to go up a size to avoid blisters, but the bigger size slips off."