The shape and materials of interior 16 may reflect and direct {HEAD ~ the sanitizing agent} onto {TAIL ~ the doorknob} 
onto
The shape and materials of interior 16 may reflect and direct { HEAD ~ the sanitizing agent } onto { TAIL ~ the doorknob }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL