smell

I've got a three year old helmet, and I ride Supermoto once a week. The helmet has now aquired a not very attractive smell of sweat. Is it possible to remove this? How do you wash a helmet? The lining is obviously not removable. Will I have to throw it away? :(

In my email: ""Hello, Sorry for the late in response. Thanks for your mail. My customer is okay with the brief detail of the bike and the price of $3,000. I have just finalized payment issues with my customer and he has informed me that he is expecting a refund payment of an equipment that...