The smell of the range hood may be that the exhaust pipe and flue are not well sealed. If the smoke exhaust pipe is under the ceiling, it can be sealed with tape or sealant. If it is above the ceiling, the part blocking the smoke pipe should be removed and glued with glass. It is also possible that the two sides of the exhaust hose are not tightly connected, resulting in falling off or breaking, which makes it stink, and it is necessary to replace an exhaust hose.