MFC-3820CN FAQs & Troubleshooting MFC-3820CN Not your product? Sort by: Updated Date Popularity 2 Results 1. 24/01/2024 My machine does regular cleaning cycles in the night. How can I correct this? 2. 10/01/2006 How do I clean the Scanner to improve the copy or fax quality? More FAQs Cleaning FAQs & Troubleshooting