FIG 6 shows a method 600 that summarizes {TAIL ~ the cleaning action} of {HEAD ~ an embodiment} of the invention 
FIG 6 shows a method 600 that summarizes { TAIL ~ the cleaning action } of { HEAD ~ an embodiment } of the invention
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH