A rotatable water-spraying bat is disclosed. The panels open to expose the interior for installation of a length of cable therein. The cord is extended through a bore of a gun with the cleaning member cleaning the bore of the gun. The present disclosure is also related to a method for taking a core sample without interrupting drilling operations. The first and second vent fan assemblies draw contaminated air in through an air inlet located on a bottom surface of the microwave range below the chamber, and exhaust the air drawn in through the air inlet.