The aspects of the present disclosure provide an apparatus for and method of reducing rotary knob produced by a plurality of detents. In particular, a rotary retainer within a rotary knob assembly. The rotary retainer has a generally cylindrical body and an angular flange protruding outwardly from and around the generally cylindrical body and a plurality of detents disposed on the angular flange. The angular flange is made of a first material capable of sustaining a torque exceeding a first predetermined threshold and wherein the plurality of detents are made from a second material different from the first material, the second material being capable of sustaining a torque exceeding a second predetermined threshold, and the first material and the second material are configured to dampen noise generated by the plurality of detents when the rotary knob is operated.