There is always a lot of talk about things you can do yourself at home to make sure your hair is healthy. It’s hard to know what to believe or not to believe.
When it comes to a cold rinse, it does help soothe the cuticle and reduce the swelling of the hair marginally. Warm water swells the hair and is obviously more comfortable to shower in than cold water. Even the thought of a cold rinse is making us get chills. Will it help with the frizz, well yes slightly.
It’s possibly not worth the risk of catching a cold during winter so you can skip it. What you may want to adapt and try is after your blowout on each section blasting it with cool air, this does the same thing but also sets the hair the way you want it. It’s hot or warm air that dries it and the cool air in fact sets it!