I’ve had luck just rubbing the worst spots real good with a cloth and some gentle soap, throwing them in a tied up pillow case, throw in the washer and add a tiny amount of bleach with detergent on a normal cycle. NBD
Adidas Ultraboosts are the pinnacle of footwear comfort an performance and nothing can change my mind. Love my pure white pair ad my orange Cane pair as well, both are clean af.