Above all else, a holiday let should smell fresh and look clean, says Margaret T Lyons, who runs Dublin-based Profitable Lettings and a sister business Proper Clean, both targeting the long-term lettings market. But the same principles apply, she says. She swears by a couple of old, housewife recipes that have again become fashionable; lemon and vinegar on glass and shower stalls and baking soda fixed with vinegar mix to clean ovens. She imports a variety of cleaning agents from the brand Method Home. Its almond and lemon floor cleaner is the lingering smell the new tenant inhales when they first put the key in the door."