MFC-J4620DW FAQs & Troubleshooting MFC-J4620DW Not your product? Sort by: Updated Date Popularity 3 Results 1. 11/16/2016 My machine does regular cleaning cycles in the night. How can I correct this? 2. 01/29/2015 Improve poor print quality. 3. 05/29/2013 Clean the Scanner to improve the copy or fax quality. Cleaning FAQs & Troubleshooting