Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -r6042952abe8c5b39b4d64c3f13f832713bcfb79a -r549fea9aba0bc5bc03d195d1a5659261e3ace9d0
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 6042952abe8c5b39b4d64c3f13f832713bcfb79a)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 549fea9aba0bc5bc03d195d1a5659261e3ace9d0)
@@ -507,16 +507,16 @@
                 confirm_id = GENERIC_CONFIRM_ID_DISINFECT_STOP_CHEMICAL;
             }
             // Send message to UI to indicate user request to cancel disinfect
-            disinfectCancelReqID = sendConfirmationRequest( confirm_id, GENERIC_CONFIRM_CMD_REQUEST_OPEN, 0 );
+            disinfectCancelReqID = addConfirmationRequest( confirm_id, GENERIC_CONFIRM_CMD_REQUEST_OPEN, 0 );
         }
         else if ( GENERIC_CONFIRM_ID_NONE != disinfectCancelReqID )
         {
-            confirm_status = checkConfirmationRequestStatus( disinfectCancelReqID );
+            // Get the confirmation request.  It consumes the request if completed and responds to UI.
+            confirm_status = getConfirmationRequestStatus( disinfectCancelReqID );
             switch ( confirm_status )
             {
                 case CONFIRMATION_REQUEST_STATUS_ACCEPTED :
-                    // send a accept close to UI, don't save request id because there will be no response
-                    sendConfirmationRequest( disinfectCancelReqID, GENERIC_CONFIRM_CMD_ACCEPT_CLOSE, 0 );
+                    // Clear request active status
                     disinfectCancelReqID = GENERIC_CONFIRM_ID_NONE;
 
                     switch ( currentStandbyState )
@@ -534,22 +534,20 @@
                             break;
 
                         default:
-                            // Close the UI Confirm
-                            sendConfirmationRequest( disinfectCancelReqID, GENERIC_CONFIRM_CMD_TIMEOUT_CLOSE, 0 );
+                            // UI Confirm already closed.  Nothing to do.
                             break;
                     }
                     break;
 
                 case CONFIRMATION_REQUEST_STATUS_TIMEOUT :
-                    // send a cancel to UI, don't save request id because there will be no response
-                    sendConfirmationRequest( disinfectCancelReqID, GENERIC_CONFIRM_CMD_TIMEOUT_CLOSE, 0 );
+                case CONFIRMATION_REQUEST_STATUS_REJECTED :
+                    // Clear request active status
                     disinfectCancelReqID = GENERIC_CONFIRM_ID_NONE;
                     break;
 
-                case CONFIRMATION_REQUEST_STATUS_REJECTED :
-                    // UI rejected, cancel pending request
-                    sendConfirmationRequest( disinfectCancelReqID, GENERIC_CONFIRM_CMD_ACCEPT_CLOSE, 0 );
-                    disinfectCancelReqID = GENERIC_CONFIRM_ID_NONE;
+                case CONFIRMATION_REQUEST_STATUS_PENDING:
+                case CONFIRMATION_REQUEST_STATUS_UNUSED:
+                    // Nothing to do
                     break;
 
                 default :