Scrubber with non-circular brush head

A brush head comprising:

• a central portion,
• an attachment feature configured to secure the brush head for rotation about a rotation axis, and
• a plurality of lobes extending radially outwardly from the central portion, at least one of the plurality of lobes extending along a rectilinear path, the rectilinear path having an inner segment and an outer segment, wherein the outer segment is located radially outwardly from the inner segment, the outer segment being angled relative to the inner segment by a non-zero angle measured in a plane perpendicular to the rotation axis, the at least one of the plurality of lobes having a proximal portion extending along the inner segment and a distal portion extending along the outer segment, the proximal portion defining an inner non-curved outer edge along one side of the at least one of the plurality of lobes, and the distal portion defining an outer non-curved outer edge along the one side of the at least one of the plurality of lobes;
• an outer ring extending circumferentially about the plurality of lobes and located radially outwardly from the plurality of lobes, with the distal portion of the at least one of the plurality of lobes coupled to the outer ring and the proximal portion located radially inwardly of the outer ring relative to the rotation axis;
• a first set of bristles coupled to the outer ring, the first set of bristles extending radially away from the outer ring and the rotation axis;
• and
• a second set of bristles coupled to the outer ring, the second set of bristles extending away from outer ring and the rotation axis;
• wherein the second set of bristles form a wave pattern extending circumferentially around the outer ring, such that a distal end of one of the bristles in the second set of bristles is spaced axially away from a distal end of another one of the bristles in the second set of bristles.