Perhaps this may work with chemical products and product that need such help. We don't. By following our diresctions for our products with our products... you will get very smooth hair that without a forced hand is staying smooth.
This might also work where the products(even some natural) chemicals regardless of temperature spread what good oils(processed or emulsified) might happen to be in their stuff. I guess it also depends on the nature theory (if there is even one) and strength of what they might be using. It (luke warm water and rinsed with cold) certainly isn't a 'long hair do or die rule' of any sort and we don't keep this in mind prior to making any product for long hair just to make it in the way certain people want to use one out there. There is no general rule that we look for to follow when we manufacture except success.
I do know you cannot move butter or good oils around properly like you think you are doing with lukewarm or cool water unless where is a high detergent value to do the job. The oils in our products and the nature of it are not such chemical, but designed to melt in at higher than body temperature (many reasons for this) without the use of the chemicals or pre-processings that an average consumer may not understand. Our products sufficiently 'open to accept' when they are supposed to, 'penetrate and close' on their own when they are supposed to, it's programmed in...unlike 'outside' products that coat or are 'simple-natured in design.
The temperature controls that you are choosing because of a tip here an there that are not speaking of Longhairs products at all, are only tips for common products that produce these needs that they arose from. Doing this with the temperature with our products is definitely going to meddle with the way our products were designed to work, which they do completely on their own ...unique in the way and depth that they penetrate. In other words what you need to do for other products out there our products do 'for you' and 'with and on it's own accord if you provide the environment it needs to naturally do so and not interfere in such a way.
The need to apply outside information on our perfectly well instructed product is indeed overkill. There is no need here for outside tips that are contrary to manufacturers directions. There is no need to make a product that feeds into these theories as we are beyond making a generic product work as that is backwards thinking.
Doing 'other directions' is like not following direction on a cake mix, because you deemed them not normal and then complain because it came out less than right.. ..after you changed the clear instructions. Besides the fact that scalp's, natural oil production system has properties that need to be activated, circulation ceated or allowed so your body can properly cleanse (plugged up scalps solidified oil in there that goes rancid, is often why some people's long hair up close smells like an old boot and their hairlines face and backs are pimply.)
Any good oil including your scalp's own oil(if it is clean and not rancid)needs to flow and not be solidified into waxy plugs.(honest...we have no conspiracy with your hot water provider) Just with most of our stuff works best with our instructions because the instructions are made for the product, not because we never checked around or forgot to ask what hoops people need to go through to make some things do their job.
Our clients hair is long, healthy growing .... problem and odor-free....and our client love to learn. Why mess with success!