Clearing a clogged drain without harsh chemicals is easy and inexpensive.
First, remove the stopper, if there is one. Then pour 1/2 cup of baking soda down the drain, followed by 1 cup of vinegar and a 1/8 a cup of lemon juice.
Let the mixture fizz away, this may take about 15 minutes.
Once the fizzing has stopped, run hot water down the drain for a minute or two, then replace the stopper. No matter what you read on the internet, it is not a good idea to pour boiling water down your drain at this point unless you are positive that you do not have any plastic pipes connected to that drain. Hot water from the tap is always the safest choice.
If you have a particularly tough clog, our Dad recommends Organic Citrus Drain & Disposer Cleaner By Zep, available at Home Depot. It must be left to work on the clog for 8 hours, but it’s worth the wait.