If your toaster is burning bread or producing a burning smell, it is often due to maintenance issues or incorrect settings:
To prevent future burning, clean your toaster at least once a month (or weekly if used daily): Always disconnect the power first. Burnt Toaster
Built-up crumbs near heating elements can ignite, causing smoke and extra heat that burns the next slice. If your toaster is burning bread or producing
Burning your toast and having to remake it might cause a five-minute delay that saves you from a larger negative event, like a car accident or a missed important encounter. Burnt Toaster