I have read several threads about their kits taking ages to start fermenting, i have just read the instructions (see below) and it says to use cold water, the WOW guides and other kits i have made always say the temperature must be between 20c and 25c before you add the yeast, would it be better to use 1.8 litres of water between 20c and 25c instead of cold water?
Empty the can into a sterile DJ then add 1.8 litreas of cold water and 450g of brewing sugar, swirl the open DJ carfully.
Put the DJ in a constantly warm place between 20c and 25c.