We've mentioned in the past over at Unplggd that Lemon Kool-Aid is a great cleanser for your dishwasher, but we never really thought about using it in our toilet before.
Although lemon works great, check out the ingredients in orange... it's the citric acid that helps to clean your bowl! All you have to do is sprinkle the contents of the package in before you head to bed, swirl it around with a toilet bowl brush, and let it sit over night. The acid in the drink mix will go to work cleaning away tough stains and build up if you don't have the best water conditions.
It's eco-friendly, so if your favorite pooch is a toilet drinker, they'll receive a happy surprise next time they go to take a lick and find out their regular "agua-de-bano" is now fruit flavored! Don't believe us? Give it a try!