cleaning a helmet.

[laolax]

so i just got a cpx yesterday. it had been used for a season by a kid that graduated last year so im wondering if there is any way that i can clean it? im really just wondering if i can just spray it out or somethign in my bathtub or if that woudl not be good for it.

thanks in advance

ps: i searched and i didnt find anythign about cleaning helmets