Prepare adequately for removing the insulation by putting on pants and tucking the lower legs into boots or shoes. Also don a long-sleeve shirt, work gloves, safety glasses and a dust mask.
Walk into the rooms of the home where the non-IC recessed lights are installed and count them. This ensures you locate all of the lights in the attic, which are sometimes hidden completely. Enter the attic and turn on the lights or plug in a work light to provide adequate illumination.
Walk around until you identify the first non-IC light. Remove the insulation from around it using a rake to pull it back from the base of the fixture. If you have batt insulation, cut it using a utility knife. Continue removing it until there is a 3-inch clearance around the entire perimeter of the light.
Place any unneeded insulation into the trash bag so you can dispose of it later.
Work your way around the attic ceiling removing a 3-inch strip of insulation from each non-IC light until you have done all of them. Count the lights as you go to ensure the number matches what you counted from within the home.