Keep the tracks and the floor under the door clear
Sweep out the bottom of the tracks and the floor where the door lands. Sand and leaves roll into the tracks and make the rollers work harder, which wears them faster. Near the beach it's mostly sand. Up in the hinterland it's leaf litter. A quick sweep every few weeks keeps it under control.
Put the remote somewhere out of reach while you sweep, so nobody closes the door on you.


