Simplify the following text for a Grade 11 native English-speaking person.
Original: William Darrell `` Billy '' Mays , Jr. ( July 20 , 1958 â `` June 28 , 2009 ) was an American television direct-response advertisement salesperson most notable for promoting OxiClean , Orange Glo , and other cleaning , home-based , and maintenance products .
Simplified: William Darrell `` Billy '' Mays , Jr. ( July 20 , 1958 â `` June 28 , 2009 ) , was an American television direct-response advertisement salesperson most well known for promoting OxiClean , Orange Glo , and other cleaning , home-based , and maintenance products .