Your freezer only has one job, with no room for error. If you don't keep on top on maintaining it, you could run the risk of food spoilage. Plus, nothing wrong with a good clean. But if you've done all you could, and there's still an issue, call Hillside.
Consult this link for a current list of consumer appliance recalls: https://www.cpsc.gov/Recalls/. If you believe you have a malfunctioning appliance, but do not see it on the list, call Hillside. We'll make sure you're safe either way.