Cleaner is an addon designed to repair and optimize 3D models imported from software that does not primarily rely on standard mesh topology, such as SketchUp, Rhinoceros, and BIM applications. It streamlines the cleanup process by executing corrective commands across all selected objects simultaneously, removing the need to process items individually. The tool provides automated functions to remove duplicate vertices, unify normals outwards, delete unused material slots, clear custom split normals, and execute limited dissolves.