1. Soak again. Before cooking, soak abalone in clean water for about 10 hour, then cook abalone in boiling water for about 10 minute, and then soak abalone in clean water for 10 hour until abalone is completely soaked.

2. If the abalone is not completely foamed, it can be heated in a pressure cooker for about 20 minutes, then naturally cooled at room temperature, and then soaked in clean water for about 10 hour until the abalone is completely foamed.

3. If all the above methods are tried but still can't solve the problem, it is recommended to consult a professional chef or food expert for more advice.

It should be noted that it is recommended to use warm water or hot water instead of cold water when soaking dried abalone. In addition, it is suggested that fresh water should be replaced during the hair soaking to keep abalone clean and hygienic.