diff --git a/CardReaderService/CardReaderService/Service1.cs b/CardReaderService/CardReaderService/Service1.cs
index 9cd3413..7039de9 100644
--- a/CardReaderService/CardReaderService/Service1.cs
+++ b/CardReaderService/CardReaderService/Service1.cs
@@ -15,6 +15,7 @@ namespace CardReaderService
         private AutoResetEvent _mainWorkerTerminationSignal;
         private string _readerName = "";
         private SCardMonitor _cardMonitor;
+        private bool _initialised=false;
 
         public Service1()
         {
@@ -40,6 +41,7 @@ namespace CardReaderService
             Console.WriteLine(_cardMonitor.GetCurrentState(0));
             if (_cardMonitor.GetCurrentState(0) == SCRState.Unknown
                 || _cardMonitor.GetCurrentState(0) == SCRState.Unavailable
+                || _cardMonitor.GetCurrentState(0) == (SCRState.Ignore | SCRState.Unavailable)
                 //|| _cardMonitor.GetCurrentState(0) == SCRState.Unaware //if we say this is an invalid state, we cause a memory leak where we create a duplicate card monitor, subscribe and overwrite.
                 )
             {
@@ -129,6 +131,15 @@ namespace CardReaderService
             {
                 if (!WeHaveValidCardReader())
                 {   //only do this if we don't have a valid card reader
+                    if (_initialised)
+                    {
+                        //card reader no longer available, tidy up.
+                        _cardMonitor.Cancel();
+                        _cardMonitor.CardInserted -= _cardMonitor_CardInserted;
+                        _cardMonitor.Dispose();
+                        _cardMonitor = null;
+                        _initialised = false;
+                    }
                     Console.WriteLine("Starting.. Getting available readers");
                     var ctxFactory = ContextFactory.Instance;
                     using (var context = ctxFactory.Establish(SCardScope.System))
@@ -142,8 +153,8 @@ namespace CardReaderService
                             _cardMonitor = new SCardMonitor(ctxFactory, SCardScope.System);
                             _cardMonitor.CardInserted += _cardMonitor_CardInserted;
                             _cardMonitor.Start(_readerName);
-
-                            StartWorkerThread();
+                            
+                            _initialised = true;
                         }
                         else
                         {