diff --git a/cachefile.php b/cachefile.php
index 2dd07cf..66a6436 100644
--- a/cachefile.php
+++ b/cachefile.php
@@ -18,10 +18,25 @@ class cachefile
       throw new Exception ($e->getMessage(), $e->getCode());
     }
 
-    $res = $this->read ("CACHE-Garbage");
+    $fileCache = $this->directory."/".sha1 ("Garbage-Lock");
+    $res = false;
+    if (file_exists ($fileCache))
+    {
+      $datas = file_get_contents ($fileCache);
+      $datas = unserialize ($datas);
+      if (($datas["createTime"] + $datas["ttl"]) >= time ())
+      {
+        $res = $datas["data"];
+      }
+    }
+
     if ($res === false)
     {
-      $this->write ("CACHE-Garbage", "Let's go, garbage !", 24*60*60);
+      $datas = array ("ttl"=>24*60*60,
+                      "createTime"=>time(),
+                      "data"=>"CACHE-Garbage");
+      file_put_contents ($fileCache, serialize ($datas));
+      chmod ($fileCache, 0666);
       $files = glob ($this->directory."/*", GLOB_NOSORT);
       foreach ($files as $fileCache)
       {
@@ -40,7 +55,7 @@ class cachefile
           continue;
         }
 
-        if (($datas["createTime"] + $datas["ttl"]) >= time ())
+        if (($datas["createTime"] + $datas["ttl"]) <= time ())
         {
           unlink ($fileCache);
         }
@@ -100,6 +115,7 @@ class cachefile
       throw new Exception ($e->getMessage(), $e->getCode());
     }
 
+    $this->garbage ();
     $fileCache = $this->directory."/".sha1 ($id);
     touch ($fileCache.".lock");
     $datas = array ("ttl"=>$ttl,
@@ -127,6 +143,7 @@ class cachefile
       throw new Exception ($e->getMessage(), $e->getCode());
     }
 
+    $this->garbage ();
     $fileCache = $this->directory."/".sha1 ($id);
     if (!file_exists ($fileCache))
       return false;