You missed one option: Go outside and let the baby be free of a diaper. ;)

Prudish people will think, "That's gross!", but the fact of the matter is that outside, there are myriad animals spreading waste products and urine on everything. Civilization has been very (monetarily) successful at convincing us that we don't.

There's a song called, "Love is in the air".

Really, that's just poop dust.