Cover print-outs are coming out with lines

All of a suden while printing out covers using I’m seeing faint lines in the image. Is this a new watermark that they’re adding ?.

It only happens on this site, otherwise the printer works fine. Any clue ?

Do the faint lines appear only when you print, or are they in the original image as well?

If they are only in the printed image, then it’s possible that some of your pinter’s heads are clogged.

Jucius, I first thought of that, but I’m always printing on a weekly bases, plus I printed something else and it was perfect.

Jucius, I did some nozzle and deep head cleaning on my canon photo printer and it worked like a charm. Looks like it was clogged after all. Thanks for the reply.