I've been running an L5-28 + coat (circa 2007 I think) for about 4 years. (former Harris, Heidelberg, MAN-Roland, Mitsu guy). When I first got to this shop, they were having all kinds of problems, as this was their first "big" press. (28" 'Big' ha-ha) Any way, we got all of the major problems sorted out, and life was good for a couple of years. This past month I've had all kinds of problems holding color. In the morning (press cold) I have to push a lot of ink. By mid day I am cutting ink and upping water. Always been, that's OK, but now when I am several hundred sheets into a run, the colors all climb (more so Cyan & Mag) and behave erratically. Nothing has been changed as far as my consumables (ink paper fount solution etc) Dumping fountain solution seemed to help a little. I can't think of anything that has changed. Chiller is working OK. Anyone have advice or clues?