1. If the machine is not cleaned for a long time, the suction of the machine will be small. It is recommended to carry out a deep cleaning 

2. For newly installed range hoods or those that have been thoroughly cleaned, it is recommended to open the window with a gap of more than 10 cm. If the gap is too small, there will be no air supply. If it is too large, the direct wind will blow the lampblack away from the cooker. 

3. If the lampblack is too large, it is recommended to turn on the explosion mode