Fine toothed combs, like flea combs work the best on cats. You do have to be careful because cat skin is so thin it is easy to tear it while combing if you hit a knot unexpectedly. This time of year you may need to comb daily, or consider having a groomer shave out any matts that get ahead of you. Maine Coons tend to be big cats, so they may have trouble reaching around to groom the center of their back. If that is the case, concentrate your combing there and ask your DVM if he is getting overweight.