It always takes some time for the scalp and hair to get used to a new care. Each of us is individual, for some the effect is visible immediately after the first use, and for others it takes 2 weeks to test the care to see the result.
If you change different care products too often, you will not get any result, or the result will not be indicative.
The main conditions for obtaining the maximum effect from Japanese care: first and foremost - professionally selected care products that are suitable for your hair type and scalp; the second is the correct use.
Also, do not forget that combing wet hair is not recommended, since under the weight of moisture they easily break. Combing wet hair is possible only with special combs designed for this.