I've got a Crystal Hen from Hardy's game calls. I really like the way it sounds, but is seems like it needs to be conditioned often. The call goes dead after five minutes of running it after being conditioned with 50 grit sand paper. It's like the dust off of the call is fouling the striker and the call. To condition the call I run the sand paper in the same direction, but I run it back and forth. I will sand down the striker as well. Should I be running the sand paper across it in one direction? For example, only run it east instead of east-west. Will this keep the dust from accumulating on the call, and fouling it so quickly? Hope this makes sense.