Daisy wheel vent stuck and the daisy top won't rotate due to many, many enjoyable cooks on the BGE? Well, take that sucker off, put in a disposable aluminum pan and spray it liberally with Greased Lightning. Turn it over and repeat - again and again until the brown stuff ceases to run off. No brushing is necessary - just rinse and dry. Clean it good enough and that baby will spin like the hubcaps of the car next to you at the redlight!!!!!!!!!!!!!