My friend Tracy recently asked, "I'm looking for a natural window cleaner as well as a natural weed killer. Do you have any proven concoctions you would like to share? I'd love to give up the Windex, and pulling weeds around the pool patio -- well, let's just say there must be a better way!" Luckily, there is a better way, and surprisingly, you can use the same key ingredient for both (with some disclaimers).

Natural Window Cleaner

For windows, the classic vinegar and water solution works wonders. I use ¼ cup white vinegar mixed with 2 cups of water in a spray bottle. This simple solution leaves mirrors, glass, and chrome streak-free and sparkling clean. You can easily make a variety of effective household cleaners using common ingredients. For more great DIY cleaning recipes, check out Women's Voices for the Earth, where you'll find everything from all-purpose cleaners to drain openers.

Natural Weed Killer

Weeds are a bit trickier. A study by the University of Wisconsin-Madison Department of Horticulture found that vinegar (acetic acid) is effective as a weed killer, but a stronger 20% solution works best. Most household vinegar is only 5%, making the 20% solution harder to find for regular home use.

However, I’ve successfully used a mixture of vinegar, liquid soap, and water to kill weeds—especially in areas like brick pathways, where you want to avoid harming nearby plants. Be careful with this spray, as it affects most plants it touches. A single application usually kills the plant, though plants with fuzzy leaves seem to be more resistant. For weeds with thick roots, like dandelions, multiple applications may be necessary to fully weaken and eliminate them.

Here’s the formula I use:

• 1 part dish soap
• 2 parts vinegar
• 2 parts water

For a small batch, mix ½ cup dish soap, 1 cup vinegar, and 1 cup water.

It feels great to use simple, natural ingredients that work without resorting to harsh chemicals that are harmful to both you and the environment.