Common vinegar is well known as an effective, nontoxic cleaning agent. In many cases, it can replace bleach and other potentially harmful products in doing some important cleaning chores. Dilute one part water to one part vinegar to clean almost anything in your house. Keep vinegar away from marble, and be sure to dilute properly or it could eat away at tile grout. Use straight vinegar in empty toilet bowls to tackle the water ring. Vinegar will be pungent at first, but any smell will subside once it dries. And, you can always add mint leaves or fragrant natural essences to freshen the air.