The apparatus may further include one or more sources of {HEAD ~ a sanitizing agent} configured to direct the sanitizing agent toward {TAIL ~ the point} of contact surface 
The apparatus may further include one or more sources of { HEAD ~ a sanitizing agent } configured to direct the sanitizing agent toward { TAIL ~ the point } of contact surface
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH