I bought a used FI 5330C2 document scanner. I have installed VueScan to try it out. I have two problems. 1. When documents are scanned they have a weird brown tinge to them. 2. When scanning in duplex mode the scanner scans almost 90% then gets stuck. Edit I seemed to figure out how to fix number 2. All I had to do is turn Auto Eject to Scan. Glass is clean. Cleaned with with air, and a microfibre cloth with glass cleaner.