There is a plastic or chemical odor when the coffee maker is new or after long storage.

Safety first: Ensure good ventilation when performing initial cleaning cycles.

• Initial cleaning: Before first use (or after long storage), run 2–3 full reservoirs of water-only brew cycles and discard the water.
• Optional mild vinegar rinse: Brew one cycle with a mixture of 1 part white vinegar to 3 parts water, then follow with 2–3 cycles of fresh water to rinse.
• Ventilate: Operate the coffee maker in a well-ventilated area until any odor dissipates.
• If strong chemical smell persists after multiple cycles: Discontinue use and contact Wolf Gourmet support, as internal components may be defective.