If the rust spot is serious, you can use rust remover to remove the rust spot first, and then use detergent.

PS: Rust remover is usually sold in hardware stores or hardware supermarkets.

PS: Authentic stainless steel generally won't rust. If it is easy to rust, the material may be stainless steel iron, not stainless steel.

It is suggested that this range hood should be derusted first, then degreased and decontaminated with detergent, and then cleaned to prevent acid, alkali, salt and water from being on the surface of the range hood for a long time.