You are not supposed to make up Neocate with cold water, it needs to be pretty much boiling for the powder to mix in with the water properly. Otherwise the powder doesn't mix properly and your lo isn't getting a proper feed.
I put in 10 scoops and then 5oz of boiling water, and mix it well. Then top up with 5oz of cold water so that the feed is not hot.
HTH x
Also, just to add, it is not advised to make up formula with water of less than 70 degrees. The reason you use 70 degrees or hotter water is to kill the bacteria in the non-sterile powder. The younger the baby, the more likely they are to get gastroenteritis from a feed that hasn't been made up in with hot enough water.
You can add powder (not Neocate though as it doesnt mix in cold water) to cooled boiled water as long as the baby drinks the milk straight away. But if you use this method, throw any unused milk away asap as it will be harvesting bacteria.
Sorry if you already knew this.