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Question:

Hot water bag is not used, but also can not open the water how to do

Hot water bag is not used, but also can not open the water how to do

Answer:

If charging warm baby, do not open.
Do you mean that there is boiling water, do not charge the hot water bag? If you want to ask a person who is more powerful to help open.
The hot water bag in the boiling water, 20 minutes after taking out, you can unscrew the hand. Because the water cooling of hot water bag inside the air is cold, bag forming negative pressure pull plug, heating to eliminate negative pressure. So you can unscrew the plug with your hand.

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