First of all, with all due respect, lets attact the problem, not the brand. If you got your red, green, pink, or purple one you might just get some rare condiiton in it that you have in the 62. In our experience it has been easier to clean beans and corn over wheat. Now. Assuming you have bottom and front screens in place; and if you are getting leaves and stalk in your grain tank you have a hole under the thresher stone door and these stalks and leaves are leaking out and being dropped on top of the fan and being blown under the seive and thus into the tank. This is simple to fix. We have found this several times and it results from a plug above the dist augers and they push out the panel in between the front auger and the bin. Unless the air choke rod is on backwards there is no way you can get leaves in the tank other than sucking them from the ground or the leak posted above or from the access panel on the rear throat floor OR if your rear feed floor has 'bowed' and thus not sealing where the front and rear meet. Think about this crop enters via throat, goes through cylinder, only what gets through the cage and grate gan get into the tank. But first it must go through the chaffer and then the seive and all the time survive the 5-25 mph air blast that is trying to blow it out the rear. This would be a tough journey for a leaf huhIJ You gotta have a leak or a tear or worn through spot (.)