Just ½ cup of Borax poured down your drain will unclog it when you follow with a couple of cups of boiling water. Add the Borax followed by the boiling water and leave for at least 15 minutes. Then just run your tap water until it is all flushed out.
Add orange peels (or any citrus peel) to a quart of white vinegar in a closed container and let it set for two weeks. Combine citrus/vinegar solution half/half with water and use for cleaning. Works on floors, tile, fixtures, etc. Smells good and is tough on scum! Best of all there are no chemicals.