Drain Cleaner
This is a tip I share with a lot of people.
When cleaning out your sinks, especially kitchen sinks, use baking soda and vinegar.
I don't measure any of it out. I simply pour baking soda over the drain hole and then I pour the vinegar.
Depending upon how dirty your drains are, you may have to do it more than once.
By using vinegar and baking soda you are saving money and the environment.