First things first, you need to get the right type of rice. I know, I know, it sounds obvious, but you'd be surprised how many people get this wrong! Jasmine or Basmati rice is usually the way to go, as they're designed to be fluffy and aromatic.
Now, onto the rice cooker itself! Make sure you're using the right water ratio, which is usually around 1:1.2 (one part rice to 1.2 parts water). Don't worry if it sounds like a math problem, it's easier than you think, I promise!
And, fun fact: did you know that rice cookers were originally invented in Japan in the 1940s? They were basically just thermal containers with a heating element, but they've come a long way since then, with all sorts of fancy features and settings.
How To Make Fluffy Rice In Rice Cooker Every Time – MUCMV