diff --git a/kindlecomicconverter/comic2panel.py b/kindlecomicconverter/comic2panel.py
index 6d47493..4012195 100644
--- a/kindlecomicconverter/comic2panel.py
+++ b/kindlecomicconverter/comic2panel.py
@@ -273,6 +273,7 @@ def main(argv=None, qtgui=None):
                         splitWorkerPool.apply_async(func=splitImage, args=(i, ), callback=splitImageTick)
                     splitWorkerPool.close()
                     splitWorkerPool.join()
+                    dot_clean(targetDir)
                     if GUI and not GUI.conversionAlive:
                         rmtree(targetDir, True)
                         raise UserWarning("Conversion interrupted.")