Hello I'm new to home brewing I really want it to work as I really enjoy the whole process! However I'm having problems with brewing largers/beers I so far have brewed a pilsner and tryed a stout after in a 5gallon fermentation bucket i washed then sanitised the bucket and then followed the instructions on the packet yet both brews have the same smell? The only thing I can think of is that I don't use heating in the brewing process and the temperature changes may have something to do with it? I have ordered a heater now but I am open to suggestions of what I'm doing wrong? I did wash and sterilise the bucket between brews? The smell is kind of sour but not vinegary . I really could do with some help any advice really would be appreciated as this is fast becoming an expensive hobby when I'm making rubbish drinks! Thankyou once again!