Index: sources/gui/qml/pages/endtreatment/EndTreatmentEndStack.qml
===================================================================
diff -u -r27cc308ff5113a9386899d3c8f8b29962a8498e1 -r7676b73cb5c976f32902ede69eec27eed62909ff
--- sources/gui/qml/pages/endtreatment/EndTreatmentEndStack.qml	(.../EndTreatmentEndStack.qml)	(revision 27cc308ff5113a9386899d3c8f8b29962a8498e1)
+++ sources/gui/qml/pages/endtreatment/EndTreatmentEndStack.qml	(.../EndTreatmentEndStack.qml)	(revision 7676b73cb5c976f32902ede69eec27eed62909ff)
@@ -39,6 +39,7 @@
         footer {
             childrenWidth       : 300
             children: TouchRect {
+                enabled         : _endTreatmentEnd.instructionIsLast
                 text.text       : qsTr("START RINSEBACK")
                 isDefault       : true
                 onClicked       : rinsebackClicked()
Index: sources/gui/qml/pages/endtreatment/rinseback/EndTreatmentRinsebackInit.qml
===================================================================
diff -u -r27cc308ff5113a9386899d3c8f8b29962a8498e1 -r7676b73cb5c976f32902ede69eec27eed62909ff
--- sources/gui/qml/pages/endtreatment/rinseback/EndTreatmentRinsebackInit.qml	(.../EndTreatmentRinsebackInit.qml)	(revision 27cc308ff5113a9386899d3c8f8b29962a8498e1)
+++ sources/gui/qml/pages/endtreatment/rinseback/EndTreatmentRinsebackInit.qml	(.../EndTreatmentRinsebackInit.qml)	(revision 7676b73cb5c976f32902ede69eec27eed62909ff)
@@ -47,17 +47,20 @@
         anchors.fill    : footer
         children        : [
             TouchRect { id  : _backTreatmentTouchRect
+                enabled         : _root.instructionIsLast
                 visible         : vTreatmentTime        .time_IsLeft
                 text.text       : qsTr("BACK TO TREATMENT")
                 onClicked       : treatmentBackClicked()
             },
             TouchRect { id : _beginRinsebackTouchRect
+                enabled         : _root.instructionIsLast
                 visible         : true
                 isDefault       : true
                 text.text       : qsTr("START RINSEBACK")
                 onClicked       : rinsebackClicked()
             },
             TouchRect { id : _endTreatmentTouchRect
+                enabled         : _root.instructionIsLast
                 visible         : vTreatmentTime        .time_IsLeft
                 text.text       : qsTr("END TREATMENT")
                 onClicked       : treatmentEndClicked()