Oh no hon!!! Did you not want to file a SNAD before trying to clean it? I've never used AppleGuard...only LMB and Wilson's so I don't know AG affects a bag but....is it fully dried? I know with LMB (which is non-darkening) it may look darker for a moment but then it dries. Same with Wilsons. Can you post a pic so we can see what you mean and hopefully have suggestions?