Brewed coffee has a plastic or chemical taste that does not go away after several uses.

Safety first: Do not ingest coffee that smells strongly of chemicals or plastic; discard and flush the system.

• Initial cleaning: Run 3–4 full tanks of plain water through the machine before first use or after long storage.
• Baking soda rinse: Mix 1–2 tablespoons of baking soda in a full reservoir of warm water and run a brew cycle, then flush with 2–3 tanks of fresh water.
• Avoid scented soaps: Wash the carafe, reservoir, and removable parts with unscented dish soap and rinse thoroughly.
• Check gaskets: Inspect rubber or silicone gaskets in the carafe lid and reservoir. If they appear degraded, sticky, or cracked, they may need replacement.
• Contact manufacturer: If the taste persists after thorough cleaning, contact OXO support; certain parts in the water path may need replacement.