mine used to do similar, Where the paper sits on top of the loading support sheet there may be a slider that holds the paper together so it feeds into the printer correctly, if this is not the case the paper as its fed can turn slightly creating a paper jam.
Bit of housekeeping may be in order then aca, might have to take the cover off and see if the roller cleaner utility is actually doing it's job. There also maybe paper still inside that is adding to the problem.. OR Whack it wiv a BIG Ammer!!!!
I would imagine it is to make sure the surface is obviously clean, but, lets say it is not doing its job to one side of the roller, the paper is going to catch better on the clean side rather than the dirty side "if that makes sence"
Will have a look around the "supprt pages" on website, see if there is anything there
If the paper feed rollers become dirty, they may not be able to properly feed paper due to the feed roller's slippage. If paper does not feed correctly, perform the following to clean the paper feed rollers.
1. Confirm that the printer is powered on.
2. If paper is set, remove it.
3. Select the Paper Feed Roller of the Auto Sheet Feeder or Front Sheet Feeder by pressing the Paper Feed Switch on the printer.
4. Press and hold the Resume/Cancel button. Release the Resume/Cancel button after the Power lamp blinks three times.
(The Power lamp blinks and the paper feed roller starts cleaning itself by revolving.)
5. When the Power lamp lights in green, repeat step 4 several times.
(Please wait approx. 30 seconds for paper feed roller cleaning to complete.)
6. To confirm whether cleaning has been performed properly, set a blank sheet of plain paper (A4 size) in the auto sheet feeder or front sheet feeder.
7. Press and hold the Resume/Cancel button and release it when the Power lamp blinks three times
(The paper set in the printer is picked up and fed.)