I used to spend money on store bought cleaning supplies. I have pretty much eliminated most of those products now. I have switched over my cleaners to safe, simple, homemade recipes. For my sinks I have been using plain ol baking soda. A couple of shakes is all you need. It works great on the porcelain and gets all the stains and gunk off.
The other great thing about cleaning with baking soda? It's so safe even my pre-schoolers can use it. Here are some recipes for other homemade cleaners.
Homemade Laundry Soap
This post is linked to the Frugal Tuesday Tip.