It's essential to clean your range hood regularly. Wash its filters and wipe them down with a soft cloth so that they can be cleaned to maintain the appliance properly.
One of the primary purposes of a range hood is to trap grease when you're cooking. If it's not adequately cleaned and maintained, the grease from your filters can drop onto your cooktop.
Other parts of the range hood can accumulate grease if not cleaned. It can also end up dripping onto the cooktop while they're trapping grease, causing a grease fire.
Keeping your range hood clean is the best way to prevent a grease fire from happening.