Actually, you could probably get new pads and clean everything else except the 'drivers' with alcohol and be fairly safe. Fairly, except I don't know how you would clean the diaphrams with out damaging them. And as they say, you just don't know were they have been.
But, if you are up to one night stands, why not take the risk, especially if they are cheap. :-)
But, if you are up to one night stands, why not take the risk, especially if they are cheap. :-)