What is associated with: cleanliness is next to fordliness is a line from this 1932 novel?

What is referred to by 'clayton'? What is referred to by 'clean soap'? Based on the clue 'clean up with this brands sweepervac wetjet', what is the answer? Based on the clue 'clean your keyboard by sliding the sticky side of ...', what is the answer? What is referred to by 'cleanliness is next to'? What is associated with: cleanup of this pennsylvania nuclear power plant following the 1979 meltdown didnt end until 1… Based on the clue 'clear transparent last name of astronaut shannon ...', what is the answer? What is referred to by 'clear or easily understood'?