A cleaning tool and method of cleaning a liner top in a well bore. The present invention also discloses methods of making theaflavin, theaflavin-3-gallate, theaflavin-3\u2032-gallate and theaflavin 3,3\u2032-digallate, each as a separate compound, pharmaceutical compositions of the above compounds, diet supplement compositions of the above compounds and methods for using the above compounds to treat or prevent various diseases. The tube thereby adapts to extension of the rode by partially unrolling the rolling wall. A sensor can also or alternatively be included on the elongate retractor shaft, for example on the blunt retraction tip, such that the sensor can monitor physiological parameters of the tissue in or adjacent to the surgical field. By the control signal from the exterior, therefore, a chip can easily enter a low power consumption mode.