Digital BW, The Print

Hello,
I run a 2100 and in the last couple of days it has started dropping black ink in the margins of the paper. Not on the image itself.

I've been leaving the printer switched on all the time - could this be a cause?

Can anyone tell me how to fix this?

thanks,
Richard
--
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   "Ignorance is the cause of fear."
   --Lucius Annaeus Seneca, the Younger 4 B.C. - A.D. 65