Thanks for your help. Basically, I do all my cleaning and maintenance, following the instructions to the letter. When the machine is working well, the images are stunning, but I seem to be having more and more issues getting the 3 white ink nozzles working. For example, I was running the machine all last week, and it ran really well. The last day I ran it was Saturday, then it wasn't used for 3 days while I was busy doing design work. Each day I swilled the bottles, etc, and when I went to run it on Wednesday, the LC nozzle wouldn't work.
I spent an hour repeating the same method; Ink Fill for 5 seconds, then 5 head cleans. Still wouldn't work. So I switched off all the valves except LC, repeated the steps above, and managed to get it working that way. But in doing that, neither GY or LM would work when I turned the valves back on. I spent another hour or so trying to get them to work, got one of them to work, but not the other. It sort of carried on like that most of the day, either only having one or two white nozzles working. In the end I just seemed to make the situation worse, and lost an entire day in the process.
I've noticed when I squirt cleaning solution or distilled water into the capping station, then using the Ink Fill button to draw it through, it seems to be getting drawn through slower than it used to. It might just be my imagination, I don't know.
Anyway, its been a pretty unproductive few days, and I'm way behind schedule. The good folk at DTG have suggested a couple of things, but will come back to me with more detail next week, so I wanted to try here in the mean time to see if I can cure the issue. At this stage I'm just having to do 2 white layers with only 2 white nozzles working, because although its heaps slower, its still faster that messing around trying to get it running.
One thing they suggested as a preventative, was the new Waste Ink Management System (WIMS). Has anyone tried this? My machine is 12 months old, but not used everyday, because I switch between designing t-shirt images, and printing.