all product are cold rinsing you don't have to buy product that are sold as cold rinsing.
going back to basics. The prespray detaches the dirt from the fibre & holds it in suspension so it can rinsed out. if your prespray does its job then a cold rinse will remove the suspended soil.....
.....but!! if it does not then you won't get all the dirt out. The problem is you cannot know if your prespray has worked 100%
this is one of the reasons a hot water rinse is preferable, hot water also is effective at detaching dirt from fibres.... so you are having 2 bites of the cherry at removing the dirt.... if the prespsray does not completely work the hot water will finish the job.
its impossible to know if your prespray has worked completely hence the need for hot water.
but if you don't have the option of hot water this fact is easily overlooked
