Thanks all. FYI, this is what the nice man from New Balance said when I wrote to them:
Thank you for writing. I apologise for that smell after using your 00 road shoes. You can scrub your shoes with an old tooth brush or similar soft bristle brush, and a light detergent (dishwashing, laundry or silicon-based cleaning product), then use a damp cloth to wipe clean. Allow your shoes to air dry thoroughly for about twenty-four hours before wearing them again. After washing your shoes by hand, put a dry cloth in the shoe all the way at the end where your toes rest to make sure the front of the shoe does not collapse once it has finished drying. Do NOT put your shoes in the washing machine or use any type of intensive cleaning product like Clorox which can contain bleach. The chemicals in those intensive cleaning products can break the shoes down or cause discoloration.
If you have any other questions or concerns, please feel free to reply to my e-mail. Have a nice evening.
Joe S.