I'm always a fan of "green," or sustainable, cleaning products. Many of these you can make at home. Google such products and you'll find bathroom cleaners and laundry detergents and much more made from simple ingredients usually on hand at home.
My new favorite green cleaner is actually a tool I picked up at Bed, Bath & Beyond.
I have struggled for years to find a cleaner that would remove the hard water buildup caused by our super-mineralized well water. No cleaners are needed with this tool. You just scrub with it until it disappears.
Now that I know how excellently it works, I have to travel back to the store and buy another one for the toilets. (No way am I using this on my sinks and toilets at the same time. Gross!)
Give it a try. At $5.99, I thought the price was pretty affordable. The amount you see missing from the stone is how much it took to clean one of my bathroom sinks.
Hope you like it as much as I do! It has erased one of my household problems.