I mop and vacumn every day as I have polished porcelain tiles that show every footprint and mark. I only use water and metholayted spirits to clean them and use an Oates spray mop. It basically has a water container attached to the handle and a microfibre cloth head and you just spray the floor as you mop. I love it as it eliminates the need for a bucket and the less water you use on my tiles the better as otherwise you get water marks so with this mop I can easily control the amount.

With corners then mop head is a rectangular shape so I go along the edge of one side then the other and kind of flick out any particles that may be in the corner that the vacumn missed.