A hydraulic rock drill comprises a housing having a piston and valve bore formed therein, a rotation motor, and a fluid connection and fluid reservoir interposed between the housing and the rotation motor. The device further includes unattached free-moving membrane-like material within which tap water is sealed inside and said material thus inserted, entirely within the said container. The present disclosure also provides a method of cleaning residues from a semiconductor substrate using the non-corrosive cleaning composition. Alloying elements can also be introduced and managed from other raw material such as alumina and bath constituents added during aluminum smelting process. This, in turn, helps maintain a planar cathode that is more amenable to downstream processing. The sensing assembly also includes a sensor housing that is removably insertable into the sensor case.