A method of cleaning a substrate before and after an LDD implantation comprising the following sequential steps. Where the fins are mounted to a crank arm, there is a locking detent, with a locking notch, integral to the crank arm. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. The host machine transfers data and provides power to the connective port through an external bus. The freezing circuit may include a compressor, a condenser, and an evaporator.