I've never owned a cooker hood before moving into my new home so yesterday took off cover to clean it. OMG. I don't think it has ever been cleaned since the house was built seven years ago. I have ordered a new filter but need to clean the cover and controls. I feel the best way to clean it is to soak it in something. Problem is the sink is one of those silly round one and I don't have a bath. The only thing that is a suitable size is the wheelbarrow. I am worried though that anything suitably strong to clean seven years of grease might damage the wheelbarrow ie. take the paint off, probably silly. Also what would be the best product to use. Have tried vinegar, soda, borax ect.