I use two of these to clean our kitchen floor once a month. I buy them online here because they are much bigger than the non-commercial green Rubbermaid version you find at the box stores. Be sure to run them through the wash before first use because they have seem to have a little bit brownish residue from the factory on the first use (pretty much all mop heads like this do in my experience, so don't fret). A set of these lasts me about three years. I love them. I use one with the cleaning fluid (like Lyson) and the the other one to rinse. After cleaning, I run them both through the washer and dryer so they're ready to go again the next time. They make my job a lot easier because you can pick up so much water in one go and are also very durable!