When i go to pull my bow back my top limb's cam pops. I didn't notice this yesterday when i went to target pratice. Is this normal? If i was drawing back on a deer im pretty sure the deer could hear it pop. Theres alittle nob on my cam that hits the limb everytime i pull back. Like i said i never noticed the noise before. Could i put a piece of Mole Skin on the nob to quietin it down or should i take it to my proshop to let them look at it.