Cats should be brushed and combed twice weekly. To reduce shedding and knotting your cat should be combed with a metal comb (long hair) or a furminator (short hair), by starting at the back, pushing the hair backwards and combing with the grain, working towards the head.
Don’t forget the armpits and belly. Comb the belly by picking up the front legs and standing the cat up.
Please do not put scissors or clippers to your cat unless shown how to do so by a professinal as you may do more harm then good.
Here is my blog post about how to brush your cat properly