I’m glad it worked out, OP. I would have tried washing them by hand before doing it in the washing machine— since it’s a gentler, more controllable process.

I would just get a new pair.

Just don’t dry them and don’t let them spin in the wash you should be fine. Throw a towel in with them. I’d probably do just one wash and one rinse cycle then air dry.

Op. I decided to bite the bullet and threw them in the wash on cold. They seem totally fine.

I have a pair that is not machine washable but just dumped a large cup of coffee on them. I just got them so am very sad. Has anyone washed the non-machine washable ones successfully? I really don’t want my feet to smell like coffee for the next few years every time
I wear them!