2. Water temperature. Warm water is better than cold water, even if seaweed is soaked in warm water and cooled before use. Warm water can better promote the glue out of seaweed. I don't believe you can try it, because it's not the seaweed particles that affect your face, but the glue in the particles.
3. soak in seaweed. It takes patience to soak seaweed. MM who has time and energy had better rub seaweed particles by hand. Slowly, you will find more and more glue in the water. Even if you are too lazy to spend time on it, soak it for a while, with cold water for 20 minutes and warm water 10 minutes.