diff --git a/vtm-android-example/src/org/oscim/android/test/MarkerOverlayActivity.java b/vtm-android-example/src/org/oscim/android/test/MarkerOverlayActivity.java
index 88bb359f..2d623b29 100644
--- a/vtm-android-example/src/org/oscim/android/test/MarkerOverlayActivity.java
+++ b/vtm-android-example/src/org/oscim/android/test/MarkerOverlayActivity.java
@@ -55,7 +55,7 @@ public class MarkerOverlayActivity extends BitmapTileMapActivity
         super.onCreate(savedInstanceState);
         mBitmapLayer.tileRenderer().setBitmapAlpha(0.5f);
 
-        // Long press receiver
+        // Map events receiver
         mMap.layers().add(new MapEventsReceiver(mMap));
 
         /* directly load bitmap from resources */
diff --git a/vtm-web-app/build.gradle b/vtm-web-app/build.gradle
index 6e07393e..d857ff39 100644
--- a/vtm-web-app/build.gradle
+++ b/vtm-web-app/build.gradle
@@ -82,3 +82,7 @@ tasks.withType(JavaCompile) { compileTask ->
     compileTask.dependsOn copyVtmAssets
     compileTask.dependsOn copyWarSources
 }
+
+clean {
+    delete "assets"
+}
diff --git a/vtm-web-js/build.gradle b/vtm-web-js/build.gradle
index 0a2f9602..d3782595 100644
--- a/vtm-web-js/build.gradle
+++ b/vtm-web-js/build.gradle
@@ -85,3 +85,7 @@ tasks.withType(JavaCompile) { compileTask ->
     compileTask.dependsOn copyVtmAssets
     compileTask.dependsOn copyWarSources
 }
+
+clean {
+    delete "assets"
+}