MFC-J3720 FAQs & Troubleshooting MFC-J3720 Not your product? Sort by: Updated Date Popularity 3 Results 1. 26/03/2015 Improve poor print quality. 2. 24/07/2013 Clean the paper pick-up rollers 3. 18/06/2010 How do I clean the Scanner to improve the copy or fax quality? Cleaning FAQs & Troubleshooting