EPSON printout problems and solutions

I had problem with bronzing on glossy paper, found a solution on net: decrease CMY, increase saturation. Yes that helped a lot, but... the darkes colors became much lighter - so that hair color - intensity, decreased a lot... good for saving ink, while retaining clarity of the picture.
The EPSON printers work in CMYK by default, but selecting "vivid" instead of "Photorealistic" seemed to make prints in CMY only!!!
Well, problem was solved for 30 minutes... again only CMYK ;(
The problem with terrific bronzing is temporal only... it disappears completely after few days waiting! The black ink is different from the other a bit. (Stylus Color 685 with dye inks).
One other thing would help a lot, head heater, if the head had constant temp. of 35 deg. Celsius, printing would be much better.