There are a few steps you can take before sanding a floor. Some people like to use a clean tack cloth to dust the surface, then vacuum it and wipe it down. Others like to use disposable lenses instead of a tack cloth, as this speeds up the process. You can also use pads or mops made for cleaning floors. Be sure to wet the pad first and then spray on degreaser if necessary. Finally, scrub lightly with the pad in one direction only.