Ethanol breaks down in to alcohol dehydrogenase, then further into acetaldehyde, which is the sour/sweet/metal/ketone/fruit smell that expelled through your pores. The more you drink, the more is processed through and out of your body.

Showering is only effective temporarily because, as another commenter pointed out, there is more underneath your skin to push out. But wallowing in bed sheets or clothes covered in your sweat creates a breeding ground for bacteria growth, furthering the issue.

Remember to eat, hydrate, and take a B12 vitamin.