Backrds, there is no maintenance that I know of.
My first thought would be voltage. Pop a cheap voltmeter in the wall and watch your voltage as you raise and lower the top. When my house batteries were dying my top struggled to get up.
The third thing to do would be to check the voltage and ground for the actuators themselves- since this is more difficult, second I'd recommend:
Put the top up and remove all the screws along both rails. They're in the corners of the upholstery as it goes from a curve to an edge on the top side of the tracks. They're easy to get back in the right place.
Once the screws are out, and you can do this as you go, fold back the upholstery. You'll be able to see the whole mechanism, and visually inspect. Verify first the two pins are in the actuators*, then there is nothing in the track (dropped screw or metal shavings).
If nothing is obvious try lowering and raising the top while watching** to see if you can see a problem... which side is catching, where in the track the moving components are when the catches happen.
My top has always been slow, but I wouldn't describe it as "jerky".
**This should be considered dangerous, the top is very heavy- failure is unlikely, but I'd bring a head sized block of wood up with you in case the worst happens and keep fingers and face away from the mechanism. You can always videotape the action for later review.
*See below, the pin was in the rail getting pushed around and the actuator was just resting end against the moving car... this is dangerous and should be approached with sufficient bracing all around the top before doing anything else.