The range hood has an important job. It removes excess moisture and smoke that is produced when cooking. The most important aspect of range hood maintenance is cleaning.
Remove and clean the metal mesh filter(s) that keep grease from getting into the ductwork. Soak the filters in a sink full of hot water and liquid dish detergent. Then rinse them clean with very hot water.
Frequently inspect the filters for grease buildup once a month or more, depending on how much you cook and operate the vent and fan. Worn or damaged filter screens should be replaced with new ones, which can be obtained from an appliance repair shop or through the manufacturer.
If you put mesh filters in the bottom rack of your dishwasher (as many amateur tipsters advise), they may leave a greasy residue behind that is hard to remove and can ultimately clog lines and affect your machine's operation. It's okay to put them in the dishwasher one you've given them an initial once-over as outlined in the previous paragraph.
For nonvented hoods, remember to replace the disposable charcoal filter every year (or according to manufacturer's directions).
With filters moved, wash the range hood interior with our All-Purpose Cleaner.