1/2 roll of sturdy paper towels (I've been using Viva brand and they are awesome)
1/8 cup baby oil
1/8 - 1/4 cup baby wash of your choice (I use Baby Magic because it smells so darn good)
2 cups hot water
Mix all the liquid ingredients in a bowl, cut the paper towels in half so you have two short rolls, put one into the liquid until absorbed (only a few seconds) and then squeeze out the liquid until they are as moist as you want them. I squeeze out quite a bit, I don't like them too wet.
And that's it! They are so fast and super cheap.