How do I prevent stickiness in a rice cooker? I have a Cuisinart dedicated rice cooker and I love the benefits.

However I get a little bit of stickiness around the sides of the cooker. A friend recommends a capful of oil while cooking the rice to prevent it from sticking, but I am not sure if that's a good idea?

The rice is sticking to side of the pot itself but it doesn't get burnt per se, just enough to make clean up a hassle.
One thing to try is to let the cooked rice rest for a while.  My rice cooker's pot is non-Teflon and scratched, but I've found that if I remove it from the heating element and let it rest 15-30 minutes, there is virtually no sticking.  If I try to remove the rice immediately, there is significant sticking.