By Niamh Kirk Without proper attention, grout can make any bathroom or kitchen look grubby no matter how much you clean it – but there’s an easy way to get it sparkling again. Grout is used to fill the gaps between tiles, but stubborn stains and discolouration can make it hard to keep it clean and, if it’s not maintained properly, mould can grow on it. Fear not though, as there’s one household product that can lift the stains and whiten the substance. Cleaning guru Kerry Hale at Mira Showers revealed how easy it is to clean mouldy or discoloured grout and transform your bathroom quickly all wi…