A tight biscuit can cause noise, so always keep a loose biscuit to arrow fit. Rough arrows can be noisey too, try buffing them with steel wool. Dirt and dust can make equiptment noise too, if the biscuit is dirty wash it with soap and water. Excessive nock pressure can increase the downward pressure of the arrow on the rest and create noise, this is a common problem with shorter bows and more acute string angles. Atilted biscuit can also cause noise, the biscuit should be perpendicular to the arrow shaft. Hope this has been useful. I've used these rests for over three years and never had a problem with them.