Another question on my F... It has adjustable walkers. They are set about in the middle of the adjustment plates. Is this right for corn? The walkers will plug with cobs and then silk. Is there any way to stop them from plugging? I need to clean them out 4 or 5 times a day. Besides being hard to clean, it is a real time waster. We are just starting harvest here, so any replies will be timely. Thanks