diff --git a/feeds.module b/feeds.module
index cba702d..4fd453c 100644
--- a/feeds.module
+++ b/feeds.module
@@ -60,8 +60,33 @@ function feeds_cron() {
   // very long.
   $sources = db_query("SELECT feed_nid, id FROM {feeds_source} WHERE id IN (:ids)", array(':ids' => $importers));
 
+  $valid_fids = array();
   foreach ($sources as $source) {
-    feeds_source($source->id, $source->feed_nid)->schedule();
+    // Get the FeedsSource object
+    $source_object = feeds_source($source->id, $source->feed_nid);
+    // Schedule all periodic tasks for this source.
+    $source_object->schedule();
+    // Find out the File ID of the temporary file for this source.
+    if (!empty($source_object->fetcher_result->fid) {
+      $valid_fids[] = $source_object->fid;
+    }
+  }
+
+  // Get current temporary feed file File IDs.
+  $result = db_select('files_managed')
+    ->fields('file_managed', array('fid'))
+    ->condition('uri', db_like('public://feeds/Feeds') . '%' . db_like('Fetcher') . '%', 'LIKE')
+    // We don't want to accidently delete a recently created temporary file,
+    // hence limit to files older than 1 minute.
+    ->condition('timestamp', REQUEST_TIME - 60, '<')
+    ->execute()
+    ->fetchAssoc();
+
+  // Delete any temporary feed files without a source.
+  while ($result as $record) {
+    if (!in_array($result['fid'], $valid_fids)) {
+      file_delete($result['fid']);
+    }
   }
 
   feeds_reschedule(FALSE);
diff --git a/feeds.pages.inc b/feeds.pages.inc
index 9bed7b7..1bc29b2 100644
--- a/feeds.pages.inc
+++ b/feeds.pages.inc
@@ -258,6 +258,12 @@ function feeds_unlock_tab_form_submit($form, &$form_state) {
   $feed_nid = empty($form['#feed_nid']) ? 0 : $form['#feed_nid'];
   $importer_id = $form['#importer_id'];
 
+  // Delete temporary files if any.
+  $source = feeds_source($importer_id, $feed_id);
+  if (!empty($source->fetcher_result)) {
+    $source->fetcher_result->deleteFile();
+  }
+
   //Is there a more API-friendly way to set the state?
   db_update('feeds_source')
     ->condition('id', $importer_id)
diff --git a/includes/FeedsSource.inc b/includes/FeedsSource.inc
index 2fe2249..8e68450 100644
--- a/includes/FeedsSource.inc
+++ b/includes/FeedsSource.inc
@@ -405,6 +405,7 @@ class FeedsSource extends FeedsConfigurable {
       $this->imported = time();
       $this->log('import', 'Imported in !s s', array('!s' => $this->imported - $this->state[FEEDS_START]), WATCHDOG_INFO);
       module_invoke_all('feeds_after_import', $this);
+      $this->fetcher_result->deleteFile();
       unset($this->fetcher_result, $this->state);
     }
     $this->save();
diff --git a/plugins/FeedsFetcher.inc b/plugins/FeedsFetcher.inc
index 33457de..fd03cc9 100644
--- a/plugins/FeedsFetcher.inc
+++ b/plugins/FeedsFetcher.inc
@@ -11,6 +11,7 @@
 class FeedsFetcherResult extends FeedsResult {
   protected $raw;
   protected $file_path;
+  protected $fid;
 
   /**
    * Constructor.
@@ -50,9 +51,10 @@ class FeedsFetcherResult extends FeedsResult {
       }
       $this->file_path = FALSE;
       if ($file = file_save_data($this->getRaw(), $destination . '/' . get_class($this) . REQUEST_TIME)) {
-        $file->status = 0;
+        $file->status = FILE_STATUS_PERMANENT;
         file_save($file);
         $this->file_path = $file->uri;
+        $this->fid = $file->fid;
       }
       else {
         throw new Exception(t('Cannot write content to %dest', array('%dest' => $destination)));
@@ -62,6 +64,17 @@ class FeedsFetcherResult extends FeedsResult {
   }
 
   /**
+   * Deletes the file containing the resource provided by the fetcher.
+   */
+  public function deleteFile() {
+    if (isset($this->fid) && $file = file_load($this->fid)) {
+      file_delete($file);
+      unset($this->fid);
+      unset($this->file_path);
+    }
+  }
+
+  /**
    * Sanitize the raw content string. Currently supported sanitizations:
    *
    * - Remove BOM header from UTF-8 files.