You can dilute vinegar in water to use as a glass cleaner. Same goes for ammonia (P.U. but it works...) and rubbing alcohol.
Also, rubbing alcohol is a GREAT disinfectant. You can wipe down your kitchen counters with it to kill germs from raw meats and the like.
But if you plan to place food items directly on your counter tops, be sure to wash again with soap and water. Even though the alcohol will evaporate, you don't want to risk your food acquiring that taste..
You can use it in your bathroom, too. It works well to prevent leaving water spots on your bathroom sink, tub, and faucets after cleaning.
Coca-Cola is not all natural, but dumping a can down your kitchen sink once a week will help prevent drain build-up which leads to clogs.
Also, when flat, add a can to your white laundry to help keep your whites staying bright. Bleach is good, but it damages and yellows the white material over time, or if over used.
Grinding a lemon, lime, or orange in your garbage disposal will not only make your sink smell good, but your whole kitchen will fill with the smell. Much nicer than air fresheners.
Baking soda makes an excellent abrasive cleaner. It isn't a harsh abrasive, either, yet works as well. Use it in your sinks, counter tops, in those crusty pans in need of scouring.
It also works great on absorbing foul odors on things like wooden cutting boards, which absorb odors such as onion.
A mix of a little water with salt and ice swirled about in your coffee pot will clean the brown coffee scum that builds up without scratching the glass. Water and rice work just as well.
This also comes in handy for baby bottles in need of scrubbing.
That's about all I can think of offhand. I hope this is what you were looking for.
orphans answered Sunday June 24 2007, 2:38 am: I couldn't really find too much on it. I don't really know what kind of cleaning solution you ment but hey, maybe this will help you.
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