 that lint will grab onto the screw, and then what it does is it just bounces all around until it hits the other screw across from it, and then it bounces all around there, and then it hits another one, and then all of a sudden you've got a spider web inside of the dryer vent. So really code is no screws, no nails, nothing holding it together. Tape it together on the outside, and, of course, less than 30 linear screws