A toaster is one of those appliances that gets used every single morning without a second thought, yet the crumb tray underneath is often forgotten for months at a time. Over that period, crumbs build up steadily, and eventually they can start to smoke slightly or even catch light against the heating elements inside.
Before doing anything at all, the toaster must be unplugged from the socket completely, and it should be left to cool down fully if it has just been used. Never reach inside a toaster while it is still plugged in, no matter how tempting it is to loosen a stuck piece of bread with a fork or knife.
The crumb tray is only the beginning Most toasters have a removable tray at the bottom that slides out for emptying, and this should be tipped out over a bin on a regular basis, ideally once a week for a household that uses it daily. Turning the whole toaster upside down and giving it a gentle shake afterwards dislodges crumbs that the tray alone cannot catch.
The outside of the toaster also collects grease and fingerprints over time, and a damp cloth wrung out well is usually enough to keep the casing looking presentable without any risk of moisture getting near the electrics. Stubborn marks near the slots should be left alone rather than scraped at with anything sharp or metallic.
With this simple routine kept up regularly, a toaster stays safer to use and carries on working reliably for many years, rather than being replaced early because of a build-up that could easily have been prevented.
It helps to pick a fixed day, perhaps whenever the bin is taken out, to empty the crumb tray without having to remember separately. Households with young children or several people using the toaster daily may find that crumbs build up faster than expected, so checking slightly more often than planned is a sensible habit to fall into rather than waiting for a burnt smell to prompt action.