Hello. I was hoping someone could shed some light on a problem I've encountered with my last two extract kits. They both have a sour taste and both have a strange thicker liquid at the bottom of the bottles. I've read that the sour taste may be the result of my sanitation and I will look into that. I have not seen any information about a darker, thicker liquid at the bottom of the bottles. When you turn the bottles upside down, the liquid falls into the beer liquid but doesn't mix into it. Any help and suggestions would be greatly appreciated. Thanks