Hello Sky21
If you open the top cover (the one on the document feeder), you will see 2 black plastic rollers. These are attached to a metal axle, which in turn is pressed on the left and right with a spring. Take out the axle including the rollers and pull the front spring (which is closer to the display of the device) approx. 5mm in length. This will slightly increase the contact pressure, which will correct the crooked feed. Reassemble everything and check if it is better. Have fun & greetings