Digital BW, The Print

Got MIS Eboni ink carts for my R800, figured out how to make a profile
with my EyeOne and was printing up a storm with scans from my 6x7 and
35mm days.  tonight my prints are showing bands at the beginning and
end of each print,  Since this never happened before, using gloss
paper almost entirely, my guess is that matte paper leaves some dust
or particles on the platen(s) and that this is released when the paper
is initialy grabbed to feed and at the end when it is to be ejected
from the printer. Any advice as to how I can back to the pleasures of
all black printing?
Thanks in advance for any advice.
John