OuR Roland RF-640 VersaEXPRESS has been dropping out cyan intermittently. The first time it dropped out I ran a Test print (photo attached) and a powerful cleaning and it seemed to fix it temporarily. Today it happened again but IS NOT clearing up with a cleaning. The head was replaced a few months ago so I don't think it's the print head. It looks like the ink path must be clogged or something. If anyone has any ideas what could be causing this I would be very grateful.