Over time the paper dust causes the feed rollers to loose their tackiness to grab the paper.

What you need is a rubber revitalizer which is a blend of special cleaners and anti-oxidants to rejuvenate buna-nitrile, EPDM and other composite rubber feeder rollers. Kenetix Rubber Revitalizer is one product you could use to clean the rollers.

If you have a silicone rollers you can use a good quality of Isopropyl alcohol to wipe them down.