A milker unit liner (20, 350, 370, 551) comprising: - a barrel (26, 354, 374, 528), and - a dome (22, 300, 352, 372, 500, 550, 600, 700, 800) joined to the barrel (26, 354, 374, 528), wherein the dome (22, 300, 352, 372, 500, 550, 600, 700, 800) comprises: - an inner surface (302, 502, 552, 602, 702, 802) defining a teat opening (304, 376, 506, 606, 706, 806), wherein the dome (22, 300, 352, 372, 500, 550, 600, 700, 800) further comprises: - means for distributing a flow of teat dip and/or cleaning fluid comprising: - an inlet (366, 386, 504, 554, 813) to the dome (22, 300, 352, 372, 500, 550, 600, 700, 800) for delivering teat dip to the dome (22, 300, 352, 372, 500, 550, 600, 700, 800), - a first flow diverter joined to the inner surface (302, 502, 552, 602, 702, 802), wherein the flow diverter is one of a vane, a pair of diverging channels (388, 811), a flow bifurcator (512, 564, 614, 720, 810) or a ramped flow controller to direct the flow to all portions of a teat extending through the teat opening (304, 376, 506, 606, 706, 806). - a barrel (26, 354, 374, 528), and - a dome (22, 300, 352, 372, 500, 550, 600, 700, 800) joined to the barrel (26, 354, 374, 528), wherein the dome (22, 300, 352, 372, 500, 550, 600, 700, 800) comprises: - an inner surface (302, 502, 552, 602, 702, 802) defining a teat opening (304, 376, 506, 606, 706, 806), wherein the dome (22, 300, 352, 372, 500, 550, 600, 700, 800) further comprises: - means for distributing a flow of teat dip and/or cleaning fluid comprising: - an inlet (366, 386, 504, 554, 813) to the dome (22, 300, 352, 372, 500, 550, 600, 700, 800) for delivering teat dip to the dome (22, 300, 352, 372, 500, 550, 600, 700, 800), - a first flow diverter joined to the inner surface (302, 502, 552, 602, 702, 802), wherein the flow diverter is one of a vane, a pair of diverging channels (388, 811), a flow bifurcator (512, 564, 614, 720, 810) or a ramped flow controller to direct the flow to all portions of a teat extending through the teat opening (304, 376, 506, 606, 706, 806). - an inner surface (302, 502, 552, 602, 702, 802) defining a teat opening (304, 376, 506, 606, 706, 806), - means for distributing a flow of teat dip and/or cleaning fluid comprising: - an inlet (366, 386, 504, 554, 813) to the dome (22, 300, 352, 372, 500, 550, 600, 700, 800) for delivering teat dip to the dome (22, 300, 352, 372, 500, 550, 600, 700, 800), - a first flow diverter joined to the inner surface (302, 502, 552, 602, 702, 802), wherein the flow diverter is one of a vane, a pair of diverging channels (388, 811), a flow bifurcator (512, 564, 614, 720, 810) or a ramped flow controller to direct the flow to all portions of a teat extending through the teat opening (304, 376, 506, 606, 706, 806). - an inlet (366, 386, 504, 554, 813) to the dome (22, 300, 352, 372, 500, 550, 600, 700, 800) for delivering teat dip to the dome (22, 300, 352, 372, 500, 550, 600, 700, 800), - a first flow diverter joined to the inner surface (302, 502, 552, 602, 702, 802), wherein the flow diverter is one of a vane, a pair of diverging channels (388, 811), a flow bifurcator (512, 564, 614, 720, 810) or a ramped flow controller to direct the flow to all portions of a teat extending through the teat opening (304, 376, 506, 606, 706, 806).