Toss in the wash with cold water. Air dry. Boom.
Pleasantly surprised
"My prior Rothy’s squeeze my toe box too much so I came into these with low expectations and a readiness to box them back up to return. But, I was surprised that the toe box fit was good! The sides of the shoe flare out a little when I flex my foot, but I’d rather it do that than be too tight. I’d readily buy another pair once another shoe in my closet wears out."