I have wood floors throughout my house. I also have a dog and live in the northeast. Needless to say, my floors, in the winter, have doggie foot prints from the front door thru to the kitchen 
I own a BONA which I purchased from Walmart. I am a clean freak and I found that it is the easiest and the fastest. I went thru all the mops - the swiffers, the wringing ones, the sponge ones. The BONA is the easiest for me. It comes with a pad that you just velcro on, it has a plastic bottle attached to it - you can either use their cleaning solution or your own. I do vinegar and water. Works perfectly on my wood floors and is not harmful to my dog. When you are done mopping, simply throw the pad in the washing machine.
I highly recommend this mop. aND, I'm 70 and no longer doing the hands and knees thing either! 