a slightly damp mop. before you mop a floor, do a bit of research to figure out what type of flooring you have and what maintenance will be necessary to keep that flooring clean. in some cases, special cleaning formulas are available to help preserve the floor's finish and prevent damage. wood floors should generally not be mopped with a lot of water; when you mop a floor made from wood, you should generally only get the mop damp, and you should use a wood-specific cleaner or detergent to avoid damaging the materials.
even if bacteria are not a primary concern of yours, you may want to mop a floor simply 