Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -rbac52336ea9e23fc2dfb4a802afe49401dfb7057 -r00ff72e0b1cf3002e660d850346e26e1209e2b24
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision bac52336ea9e23fc2dfb4a802afe49401dfb7057)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 00ff72e0b1cf3002e660d850346e26e1209e2b24)
@@ -1178,6 +1178,7 @@
 
         if ( TRUE == isBloodLeakZeroingNeeded() )
         {
+            // If the sensor has drifted request a zero prior to transitioning to treatment
             zeroBloodLeak();
         }