diff --git a/app/controllers/announcement_feeds_controller.rb b/app/controllers/announcement_feeds_controller.rb
index fa2b0d9..b761d67 100644
--- a/app/controllers/announcement_feeds_controller.rb
+++ b/app/controllers/announcement_feeds_controller.rb
@@ -2,6 +2,9 @@ require "rss"
 class AnnouncementFeedsController < ApplicationController
 	include Admin::AnnouncementsHelper
 	def feed
+		Thread.new do
+			BulletinFeedCache.all_of({:invalid_date.ne=>nil,:invalid_date.lte => Time.now}).delete_all
+		end
 		uid = params[:uid]
 	    startdt = params[:start].blank? ? nil : params[:start]
 	    enddt = params[:end].blank? ? nil : params[:end]