The harsh chemicals reek for drain cleaners. I'm looking for alternatives - pre-made or make myself. Thanks!
1/4 cup baking soda, followed by 1/4 cup vinegar.
Wait 5 min and pour in a kettle of boiling water.
Will dissolve grease & soap scum, but won't break down a big wad of hair (ask me how I know!)
For hair, etc., there are enzymatic drain openers that are VERY effective -- and they can be used weekly to keep the drains clean as well.
I like Earthworm Natural Enzyme-Based Family-Safe Drain Cleaner