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    how to remove streaks or dust from printed paper?

    I have a printer Canon LBP 3010b.Now I have a problem that is my printed result is worse!On the left of printed paper,there are verticle streaks(ink or toner).What should I do?Must clean the cartride?And then how to clean my cartride of LBP 3010b?Anyone help me please as soon as you can!thx...
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