A stylet unit for implanting a removable lead system for a cardiac stimulation device includes an elongated main body having an enlarged feature at the distal end of the main body with a rounded blunt tip end, a width greater than the width of the distal end of the main body, and a length greater than the width. The apparatus for adjusting a voltage in the power distribution system adjusts the voltage by switching a switch that lies on a path in the power distribution system. The controller is configured to control the water valve to introduce water into the reservoir to dilute the additive and initiate delivery of the diluted additive to the washer at a predetermined time during a wash cycle.