My old fridge freezer works ok but the plastic trim at the top and between the bottom of the fridge and top of freezer, is really badly yellowed. I’ve tried a mix of bleach and bicarb and scrubbed it with a magic eraser then left it for a few hours but it’s made no difference at all. I’m moving into a new build flat with a white kitchen and would like to smarten it up. Does anyone have any ideas or even know if it’s possible?