I' m new to bowhunting and love it. I bought me a Fred Bear Epic Extreme last season and love it. I shoot about 4 to 5 times a week and shot from the ground and stand. My question is this: I shoot beman ICS arrows and I have noticed that the fletching has black marks on them. What do I need to do? The bow is on target and I noticed this and want to fix it if I can. Can anyone help me out? Thanks in advance. Paul