MFC-7220 FAQs & Troubleshooting MFC-7220 Not your product? Sort by: Updated Date Popularity 3 Results 1. 12/11/2009 How do I clean the corona wire? 2. 12/26/2006 How do I clean the laser scanner window? 3. 09/06/2006 How do I clean the scanner glass? Cleaning FAQs & Troubleshooting