Nice to have you on the forum.
New snakes many times have a settling in period.
Your snake is also in opaque phase(shedding phase) many snakes don't eat during that time. The eyes will go back to clear within a few day. You can expect a shed anytime after that. Make sure you have an adequate dish of water available in case the snake wants to soak before it sheds.
Guest curious as to why you tried to scent with chicken broth?
Here's a link to the care sheet which should answer many questions you might have.
You can post any other questions to the forum for advice.
Any idea which garter snake you have. That can also have some effect of the food you should try.
What part(State) of the country are you in?
Garter Snake Care Sheet - Caresheets