Zep32oz Zep Grout Cleaner Zu104632 Kitchen & Bath Cleaner

Q: What do you apply ZEP grout cleaner with to keep it on the grout alone?

When you remove the cap, there is a squirt hole in the top of the bottle, similar to what you see on a salad dressing bottle. That allows you to "aim" the liquid somewhat. We poured the cleaner onto the grout and gave it a few strokes with this brush - http://www.amazon.com/gp/product/B00004OCLR/ref=wms_ohs_product?ie=UTF8&psc=1 . It was nothing short of amazing. We have white grout that had taken on a greyish tinge with age. This product brought it back to brand new with very little effort. I did use a water extraction device (Rainbow) to remove the chemical. The same could be accomplished with a wet / dry vac and a few rinsings. The cleaner that got on the tile had no affect whatsoever.