diff --git a/kabot/kabot/kabot.py b/kabot/kabot/kabot.py
index 6404603..5936345 100644
--- a/kabot/kabot/kabot.py
+++ b/kabot/kabot/kabot.py
@@ -62,15 +62,16 @@ def main():
         print(message.content)
         if message.author == bot.user:
             return
-        if message.content == 'pwet':
-            await message.channel.send('pong')
         else:
-            if bot.user in message.mentions and len(message.mentions) < 3:
+            if bot.user in message.mentions \
+                    and len(message.mentions) < 3 \
+                    and len(message.content.splitlines()) == 1:
                 path = '/tmp/%s.log' % message.channel
                 with open(path, 'r') as f :
                     lines = f.read().splitlines()
-                with open(path, 'a') as f :
-                    f.write(message.content + '\n')
+                if not message.content in lines:
+                    with open(path, 'a') as f :
+                        f.write(message.content + '\n')
                 response = random.choice(lines).replace(str(bot.user.id), str(message.author.id))
                 await message.channel.send(response)
         await bot.process_commands(message)