here’s how i like to think about the words “use” and “utilize.” may this be helpful to you if you’re having a difficult time in choosing which to write or say.
use means that an item is employed for the purpose it was created (e.g., i’m going to use this toothbrush to clean my teeth)
utilize means that an item is employed not for the purpose it was created (e.g., i’m going to utilize this toothbrush to remove the fuzz from my hairdryer vent)