Some bathrooms are small enough to clean the floor in a few swipes with sponge. But if you have a larger bathroom and want to save your back, a mop is a must have. Twist mops with replaceable heads are your best bet, because they allow you to control the water on the head while mopping and you can throw the head away when it's clearly seen its last swipe. You can also use a dry mop to get cobwebs out of remote corners of the ceiling. If you want to get a little more high tech, there are some electric floor cleaners that function like a mop but with a little less effort on your part.