Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean porcelain tiles [title] Sweep the floor with a dust mop. [step] Start by sweeping the floor to remove any dust on the porcelain tiles. You can use a dry dust mop or a vacuum.

Ending1: You can also use a microfiber mop, as it will be gentle on the tiles. Brooms with straw or plastic bristles will be too harsh on the floor and could scratch the tiles. Ending2: A dust mop works the same way as a vacuum, except that it uses a carpet cleaner instead of a floor cleaner. Use an air dry mop to sweep up debris and smooth the floor completely. Ending3: You can also use a two to three-stick mop. Rinse the mop with cold water when you are finished. Ending4: Once you have worked all of the dust off, you'll need to dust the entire floor. Aim for hard, sweeping strokes across the tiles.

Answer format: ending1/ending2/ending3/ending4