Whatever happened to the handkerchief?

I know it sounds gross to think about, but whatever did happen to the good old snot-rag. When you get a cold, allergies or flue, you're going to need something to wipe away the excess mucus that constantly drains from your nose. Kleenex is hardly environmentally friendly so why not just use a handkerchief instead? Sure, it will get all messy but then you could just rinse it out and hang it up to dry.