MFC-T800W FAQs & Troubleshooting MFC-T800W Not your product? Sort by: Updated Date Popularity 3 Results 1. 16/11/2016 My machine does regular cleaning cycles in the night. How can I correct this? 2. 23/03/2015 Improve poor print quality. 3. 29/05/2013 Clean the Scanner to improve the copy or fax quality. Cleaning FAQs & Troubleshooting