Digital BW, The Print

Hi again, Guys,

I'm having the overspray problem yet again; this is the third epson
printer that had it.  However this one is still well within warranty. 
Before I contact epson, are there any on this list who have successfully
solved the problem?  At first, if you do a few under the printhead
cleanings with an ammonia soaked and dampened paper towel, it goes away
for a few prints, but then comes right back.  Is this a defective
printhead, or something else? I've run lots of cleanings, and there are
no clogs or air in the inktubes, so that isn't the problem.  This time,
it is on the top and bottom of horizontal images, but not on the sides.

Thanks for any help you can offer.

Jerry