Secondly, the detergent is added to help break down cell walls in the onion cells.
(the detergent; is added; to help break down cell walls in the onion cells) (the detergent; to help; break down cell walls in the onion cells)
the detergent the detergent
is added to help
to help break down cell walls in the onion cells
break down cell walls in the onion cells