How often should you wash your clothes?

You should wash your clothes if there really dirty, but try not to wear them over 3-4 days.

i guess the answer above is correct, but you should clean them as soon as possible after your through wearing them to prevent stains from setting in or even forming. some liquids that are clear but sugary, like Sprite, you can't see at first but over time the sugar will carmalize and form brownish spots. also moths and bugs feed off the sugar or sweat left in dirty clothes and chew holes in them.