Natural Homemade ‘drain-o’, or How To Unclog Without Harmful Chemicals | Bonzai Aphrodite
http://bonzaiaphrodite.com/2009/06/natural-homemade-drain-o-or-how-to-unclog-without-chemicals/

And this recipe is easy enough, but I swear it works like a charm. You don’t need complex, carcinogenic compounds lurking around your cabinets! Baking soda, baby, and a liberal splash of vinegar.

Next time I'll have to try covering the hole...that probably makes it work better than when I've done it in the past. Great little site. Drupal or Wordpress (Drupal). (One of these days I'll figure out how to tell the dif.)

Como usar a soda caustica para limpar

hm...