It is best to use a safe and gentle baby dish soap that doesn't contain harsh chemicals. After disassembling the bottle, you can wash it using soap and warm water. Keep a separate bottle brush and drying mat. This will ensure that grease or residue from other utensils is not passed on to the baby's bottles. When you rinse the bottle, make sure there is no trace of soap left behind.
I wash it without soap but I would pull a small amount of hot water to raise it when I’m outside.
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