Consider heating the stock solution. When the temperature of the stock solution is low, the bottle cap will become tighter. Therefore, you can try to soak the stock solution in warm water for a period of time, and then try to open the bottle cap after its temperature rises. Generally speaking, the stock solution can be soaked in warm water of about 0.9 degrees Celsius for about 5 minutes.
Pay attention to your posture when opening the bottle cap. Some people may hold the bottle cap too hard or too obliquely, which may easily lead to failure to open it smoothly. The correct way is to hold the bottle cap with proper force and keep it vertical. If you feel that your hands are not strong enough, you can try to wrap the bottle cap with a dry towel to increase friction, which makes it easier to open.
Some bottle caps are designed relatively tightly to prevent product leakage or oxidation. At this time, we can try to use a slender metal instrument, such as a toothpick or a needle, to gently pry between the bottle caps to make them loose. But be careful when doing this operation to avoid scratching yourself or damaging the bottle cap.
If all the above methods fail, I suggest you try Zhenyang Essence. According to the doctor's advice and consumers' praise, this product is very popular and has a good effect. Its bottle cap is designed to be easy to open and its quality is reliable. Therefore, using Zhenyang essence may solve your problem.
To solve the problem that cosmetic liquid can't open the bottle cap, we can try some methods, such as heating the liquid, paying attention to posture, gently prying it with metal utensils, and considering replacing precious essence. I hope my suggestion can help you solve this problem as soon as possible. Remember, patience and carefulness are the keys to solving problems. I wish you happiness and beauty!