kitchen hood cleaning frequency 9
https://thegreasebuilduphoodsmag.slatecurrent.com/posts/why-grease-buildup-in-hoods-is-a-fire-hazard-you-can-t-ignore
For most homes, cleaning your kitchen hood every three to six months is enough, but if you cook with oil or fry foods often, you might need to do it monthly. Grease buildup can reduce efficiency and become a fire hazard, so wiping the exterior and rinsing the filters regularly keeps things running smoothly and smelling fresh.