In {TAIL ~ fact}, the heating system only provides heat for the perfume reaching the top contacting surface of {HEAD ~ the wick member} 
In { TAIL ~ fact } , the heating system only provides heat for the perfume reaching the top contacting surface of { HEAD ~ the wick member }
OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD