Epson printer's are pure crap, at least the one's I've wasted my money
on.
That includes the following models:
Epson Stylus Pro and Pro XL.
Epson Stylus 1500 and the later "Colorado" model.
Epson 800



I had an old Stylus Color IIs that worked beautifully and never clogged.
Later I had a Stylus 600 which would clog constantly. I also had a couple
Canon printers that behaved similarly, HP is the only one that seems to be
decent but I got a laser printer for my B&W stuff now and it never clogs.