1. First remove the filter screen for cleaning: remove the filter screen from the range hood, scrub it in warm water, and brush off the grease with a brush. Carry out deep cleaning every 3 months or so.

2. Clean the flue joint: take the flue out of the joint, soak the flue in warm water for scrubbing, and use a brush to remove the oil stains attached to it.

3. Cleaning the interior of the range hood: open the oil guide groove of the concave range hood and scrub the side wall, back wall, interface and valve. Finally, rinse with warm water and cleaning agent.

4. Clean the inside of the flue: use flue cleaner, spray gun and ribbon to clean the inside of the flue.

5. Thoroughly clean the whole: finally, use sanitary ware purifying agent to contact and clean the surface of the range hood, thoroughly clean the whole and restore the original appearance.

The above is the cleaning method of concave range hood. Remember to clean the range hood regularly, which is very effective in removing odor and preventing fire.