As the title states, I have unglazed tile flooring and there are stubborn dirt spots. I've used a fiber mop to get dust and debris up. I've used a combination of white vinegar and water to wet mop the floor, but the dirt spots remain. I believe using something like Scrubbing Bubbles is not wise as it is abrasive, is that correct? I'm looking for some cleaner, or concoction I can make, to clean the stubborn spots.