MFC-9970CDW FAQs & Troubleshooting MFC-9970CDW Not your product? Sort by: Updated Date Popularity 5 Results 1. 09/07/2015 Clean the inside of the machine (video instructions available) 2. 01/11/2010 Clean the drum unit 3. 22/10/2010 Clean the inside of the machine 4. 15/10/2010 Clean the paper pick-up roller 5. 15/10/2010 Clean the corona wire English Cleaning FAQs & Troubleshooting