Testers slather tiles with stubborn stains such as grape juice, mustard, ketchup, and grease. They also spray a soap scum residue on bathroom tiles. Then the cleaners are applied as directed. Most say you just spray them on and wipe. Others are a little more labor intensive. You have to apply them and then rinse them off.
The tiles are then placed in a scrubbing machine. It gives each tile the same number of swipes with a paper towel. The tests show some cleaners worked better than others.
Testers also left the cleaners on a variety of surfaces overnight to mimic an unnoticed spill. Some marred metal finishes, which could be a problem with your kitchen or bathroom faucets.
Consumer Reports found that with convenience came a little less cleaning power. None of the sprays excelled at cleaning all the stains.
In fact, after scrubbing more than 500 tiles, only one cleaner did well enough to be recommended--Pine-Sol Original. It’s not as easy to use as a spray, but it beat all the other cleaners by a wide margin.
If you still would rather use a spray, Consumer Reports says your best option is Seventh Generation Natural All Purpose.