I am having problems with missing white channels. This has been an ongoing problem with some of them varying by the day. It seems to be predominately the inside and outside white channels. Today it is the outside white. Two days ago I replaced the 0, 00, 000 ribbon cables as well as the print head. I then powered up and printed 40 shirts and everything was fine. When starting up yesterday, this channel was splotchy and after an F1 cleaning all was great and I printed another 20 shirts or so. Today when starting this channel was splotchy again and I performed an F1 cleaning and it disappeared completely. I have sense let it sit for an hour done another F1 cleaning and it is splotchy again. Any ideas? Possibly the damper? If the damper is replaced, does it always need an F4 cleaning afterwards?