There are several effective clog buster recipes you can use at home. Most of these recipes are comprised of items you can find in your pantry. By eliminating chemicals, you are being more eco-friendly, and saving money at the same time.
Baking Soda Fizz
With a cup of baking soda followed by a cup of white vinegar, most clogs can be removed. A funnel is helpful for this recipe, but not entirely necessary. This works best if you use the baking soda first. Pour it in the funnel to allow it to get in to the drain. Follow this up with the vinegar. The fizz that is created will help to weaken any clogs. Allow this to sit for about 30 minutes, then flush it with hot water. You may have to use this method several times for extreme clogs.
Cream of Tartar
This is another method that works without creating toxic fumes. Mix a cup of standard baking soda, 1/4 cup of cream of tartar, and a few tablespoons of salt. Kosher salt or sea salt work best since they have a more coarse texture, but plain table salt will work in a pinch. Mix the concoction together until it has an even consistency. Pour a quarter cup of the mix in to the drain. Again, a funnel is a good idea here. Follow the mix with a few cups of boiling water. Wait about a minute for the mix to get to the clog, then flush away with cold water. This may be done several times if necessary, but typically works with just one application. Any remaining mixture can be stored in a glass jar and will stay fresh for several weeks.
Salt and Hot Water
While this method won't work on heavily clogged drains, to clear up everyday gunk it's fairly effective. Take a cup of course salt and funnel it in to the drain. Follow this up with boiling water. The boiling water will force the salt through the pipe and clear away built up grime that remains on the inside of the pipes. You may have to follow up the original treatment with more boiling water. If the water doesn't drain, you have a clog that the salt mixture won't fix, and you should try another method once the water has cooled down.
Another way to break up a clog is to use a simple plunger. You can find small, sink sized plungers at any big box or home improvement retailer. You can store these under the sink easily to use when needed. It's important to plunge before you use any commercial product to clear a drain. The plunger is going to pull the clog, and if commercial drain cleaner has been used it can splash back up. It will take a few tries with the plunger to break up the clog. This isn't going to remove the clog entirely, but will loosen it enough for you to use one of the above methods effectively.