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Sounds like your Lsu is dirty or a bad roller. If your Lsu is dirty then clean it will a cloth. If your roller has went bad then you will have to have that replaced (but it is easy to install yourself).
The blades also could be dirty since it is smudging. They are easy to clean but you have to be careful about putting them back into the printer so that it is in correctly or it could damage them.
They actually have a video on youtube that will talk you through the cleaning: https://www.youtube.com/watch?v=cbDyxocOYGA