Its normal for feathers to wear over time. What kind of material do you have on the shelf? They make any number of softer material like calf or seal hair that will quiet the draw and prolong the life of your fletching. My longbow has leather on the shelf so I have several arrows that looked like the fletching was chewed on. When I make my arrows, I use fletch tape so I can eaily remove and replace the fletching on my cedar arrows. No scraping or sanding required and no drying time.