You did not post the info on the item. Many things that heat water to a boiling point have this problem as they age. The reason is due to pitting of the heater unit or accumulation of scale and mineral deposits. This causes hot spots in the boiler and you hear the steam pockets expanding
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You did not post the info on the item. Many things that heat water to a boiling point have this problem as they age. The reason is due to pitting of the heater unit or accumulation of scale and mineral deposits. This causes hot spots in the boiler and you hear the steam pockets expanding