diff --git a/modules/ecrans/backend.py b/modules/ecrans/backend.py
index ca21b0d3..53505fa0 100644
--- a/modules/ecrans/backend.py
+++ b/modules/ecrans/backend.py
@@ -18,8 +18,6 @@
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 "backend for http://www.ecrans.fr"
 
-import time
-
 from weboob.capabilities.messages import ICapMessages
 from weboob.tools.capabilities.messages.GenericBackend import GenericNewspaperBackend
 from .browser import NewspaperEcransBrowser
@@ -35,32 +33,7 @@ class NewspaperEcransBackend(GenericNewspaperBackend, ICapMessages):
     DESCRIPTION = u'Écrans French news website'
     BROWSER = NewspaperEcransBrowser
     RSS_FEED = 'http://www.ecrans.fr/spip.php?page=backend'
-    RSSID = rssid
-
-    def set_message_read(self, message):
-        self.storage.set(
-            'seen',
-            message.thread.id,
-            'comments',
-            self.storage.get(
-                'seen',
-                message.thread.id,
-                'comments',
-                default=[]) + [message.id])
-
-        lastpurge = self.storage.get('lastpurge', default=0)
-        l = []
-        if time.time() - lastpurge > 7200:
-            self.storage.set('lastpurge', time.time())
-            # Get lasts 20 articles
-            for id in self.storage.get('seen', default={}):
-                 l.append((int(url2id(id)), id))
-            l.sort()
-            l.reverse()
-            tosave = [v[1] for v in l[0:19]]
-            toremove = set([v for v in self.storage.get('seen', default={})]).difference(tosave)
-            for id in toremove:
-                self.storage.delete('seen', id)
-
-        self.storage.save()
+    RSSID = staticmethod(rssid)
+    URL2ID = staticmethod(url2id) 
+    RSSSIZE = 10