You would use a wire hanger to hang up clothes.
You would utilize a wire hanger to make an antennae.
PepGiraffe used dental floss to floss her teeth.
PepGiraffe utilized dental floss to lace up her shoes.
What is tricky is that as far as I can tell, you can always substitute the word use for utilize, but not always the other way around. To get around this, never use the word utilize. Unless you are talking about MacGyver.
Using wire hangers
Utilizing wire hangers (unsuccessfully)