Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -re6c60e07b450ec8d58e87bf13d45f96efab54d8b -r05c60dd887a705b7044d4e0545776b99583cfa3d
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision e6c60e07b450ec8d58e87bf13d45f96efab54d8b)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 05c60dd887a705b7044d4e0545776b99583cfa3d)
@@ -23,6 +23,7 @@
 #include "MessageSupport.h"
 #include "ModeChemicalDisinfect.h"
 #include "ModeFault.h"
+#include "ModeFill.h"
 #include "ModeHeatDisinfect.h"
 #include "ModeStandby.h"
 #include "NVDataMgmt.h"
@@ -263,6 +264,9 @@
     {
         pendingStartDGRequest = FALSE;
         signalSyncToHD();
+        // About to start a treatment reset the chemical bottles volumes (regardless whether the user has inserted new bottles)
+        resetChemicalUsedVolumeML( BICARB );
+        resetChemicalUsedVolumeML( ACID );
         requestNewOperationMode( DG_MODE_GENE );
     }
     else if ( TRUE == pendingStartDGFlushRequest )