MFC-J870DW FAQs & Troubleshooting MFC-J870DW Not your product? Sort by: Updated Date Popularity 3 Results 1. 24/01/2024 My machine does regular cleaning cycles in the night. How can I correct this? 2. 16/09/2014 Improve poor print quality. 3. 06/09/2013 Clean the Scanner to improve the copy or fax quality. More FAQs Cleaning FAQs & Troubleshooting