my printer started printing poorly in black ink, got worse so I cleaned the printhead which didn't help, replaced the printhead, popped in with no trouble, didn't need set up cartridges or anything, worked great for several days and then started showing same issues again. I can print in black ink, 1 page every 45 minutes or so, first thing in the morning, 2 or 3 pages. It's like something isn't re-inking right away. I am fairly certain the new printhead is in good working order and have not attempted to clean the new one, is there some other piece of hardware that isn't working that could cause the printhead to clog? what else can I check besides the printhead. color ink all works great and the pages I am able to print in black ink, though few and far between, also look great. I am so invested in this problem, would like to understand what's broken, even if I can't fix it. would appreciate any insight.