Don't despair. A lot of babies take a while to get started. A healthy hatchling can easily go a month without eating so there's no cause for worry at this point. Leave the baby alone between feedings, as Dave said. I wouldn't start scenting the mouse at this point. The goal is to get it eating, ideally unscented f/t mice. Scenting is certainly a great tool for coaxing stubborn babies to eat but it's not the first thing to try since it can be tough to wean some babies from scented prey.
How is the baby housed, and how are you offering prey? If it's on paper towel or newspaper substrate here's a suggestion that often succeeds. Next feeding day (which should be 2-3 days after the last attempt) try making sure the mouse is really hot and place it right beside the opening of the baby's favorite hide. Go away and don't peek for at least an hour; two hours is better. If the mouse hasn't been eaten, do another dip in hot water, cover the viv with something like a towel and leave it for two more hours or overnight.
Feeding in a small brown paper bag often works well, too. Close the bag with clothespins, paper clips, etc. - NOT TAPE. Be sure to place the bag in the viv so that if the snake gets out of the bag it's still safely contained.
I know how frustrating stubborn babies are - but I also know how great it is when they get going! You and your hatchling have time. Don't pester him between offerings, and let us know how it goes. We're pulling for you both.