The best Gorenje+ cooker hoods feature special aluminium filters with patented cassette insert that helps to stop up to 98% of grease coming from contaminated air while achieving energy class A for grease filter absorption efficiency. In addition they have a built-in sensor that is able to perceive when the grease or charcoal filters are saturated with grease particles to an extent that it impairs optimum hood performance. With normal use, cleaning is recommended every two months. It is quite simple – using water and manual dishwashing detergent, or washing them in the dishwasher at 65 °C. Such cleaning may affect the colour of the filters, but it will in no way reduce their efficiency! On the contrary: clean filters improve the efficiency of operation and contribute to longer useful life of the hood.