Rinse and run water through the machine before brewing

A new coffee maker has manufacturing residue, dust, and oils from the factory inside the water tank, pipes, and brew basket. Before you brew your first cup, fill the water tank with fresh cold water, place an empty mug or carafe underneath, and run the machine through a full brew cycle without any coffee grounds. Discard that water.

Repeat this process two more times. The first cycle clears the largest particles; the second and third cycles remove the chemical smell and taste that new machines often have. This takes about 15 minutes total and makes a real difference in the flavor of your first actual pot.

Key Takeaways

  • Run three full cycles of plain water through a new coffee maker before adding grounds, because factories leave residue and oils inside the pipes and tank.
  • Wash the brew basket, carafe, and any removable parts with hot soapy water and dry them completely before the first use.
  • Check the water tank for any loose plastic pieces or debris and wipe it out with a damp cloth if needed.
  • Most coffee makers need a deep clean with vinegar or a commercial descaler every one to three months, depending on your water hardness.

Clean the removable parts by hand

While the water cycles are running, wash every part that touches water or coffee. This includes the carafe (glass or plastic), the brew basket, the filter holder, and the lid. Use hot soapy water and a soft sponge or cloth—avoid abrasive scrubbers on non-stick or plastic surfaces.

Dry each piece completely with a clean towel before putting it back in the machine. Water spots and residue left to air-dry can affect the taste of your coffee and leave mineral deposits over time. Pay special attention to the brew basket, which often has small crevices where dust collects.

Inspect the water tank for debris

Open the water tank and look inside for any loose plastic pieces, dust, or manufacturing debris. New machines sometimes have small plastic shavings or protective coatings that can flake off during shipping. Wipe the inside of the tank with a damp, lint-free cloth or paper towel.

If you see anything that looks like it doesn't belong, remove it. Run your hand along the bottom and sides to feel for any rough spots or particles. A clean tank prevents debris from entering the water lines and affecting your coffee's taste.

Check the heating element and water lines

Most coffee makers have a heating element at the bottom of the water tank or inside the machine body. You usually cannot see it directly, but you can check for visible buildup or discoloration around the water inlet where the tank connects to the machine. If you see white crusty deposits (mineral buildup), that is normal on used machines but should not appear on a brand-new one.

The water lines inside the machine are harder to inspect without taking the machine apart, which you should not do. The three water-only cycles you ran at the start will flush out any loose particles. If the machine has a removable water filter cartridge, check that it is installed correctly and not clogged.

Understand your water type and cleaning schedule

Hard water—water with high mineral content—builds up scale inside the machine faster than soft water does. If you live in an area with hard water, you will need to descale (deep clean) your coffee maker every one to two months. Soft water areas can usually go two to three months between descales.

You can check your water hardness by looking at your water bill, calling your local water utility, or buying an inexpensive test strip at a hardware store. Knowing this helps you plan maintenance and keeps your machine working longer. Descaling uses either white vinegar or a commercial descaling solution and takes about 30 minutes.

Daily cleaning to keep your machine fresh

After each use, empty the grounds from the brew basket and rinse it under hot water. Wipe out the carafe and dry it. If your machine has a removable water tank, empty any leftover water and rinse the tank once a week, especially if you do not use the machine daily.

Leaving old water or wet grounds in the machine creates mold and mildew, which affects taste and can damage the machine. A quick rinse takes 30 seconds and extends the life of your coffee maker by years. If you use the machine every day, these daily steps are all you need between monthly or quarterly descales.

When to descale and what to use

Descaling removes mineral buildup from inside the water lines and heating element. You will know it is time when the coffee brews slower than usual, or the water does not heat as hot. Fill the water tank with a 50-50 mix of white vinegar and water, place a large mug underneath, and run a full brew cycle. Discard the liquid.

Repeat with the vinegar mixture two more times, then run three full cycles with plain water only to rinse out the vinegar smell. If you prefer not to use vinegar, commercial descaling solutions like Dripkit or Cafiza work the same way and leave less odor. Follow the product instructions for the correct ratio of solution to water.

Frequently Asked Questions

Can I put my coffee maker parts in the dishwasher?

The carafe and brew basket are usually dishwasher-safe, but check your manual first—some plastic tanks and lids can warp in high heat. The machine body itself should never go in the dishwasher. Hand-washing takes two minutes and is safer for all parts.

What if my new coffee maker smells like plastic or chemicals?

That smell comes from manufacturing oils and protective coatings. Running three full cycles of plain water through the machine removes most of it. If the smell persists after that, run one more cycle with a 50-50 vinegar-and-water mix, then three cycles with plain water. The smell should be gone after the first pot of actual coffee.

How do I know if my water is hard or soft?

Call your local water utility and ask, or check your water bill—many utilities list hardness levels. You can also buy a water hardness test strip at any hardware or home improvement store for a few dollars. Hard water shows white mineral deposits; soft water rarely does.

Can I use bottled water in my coffee maker?

Yes, bottled water works and may reduce mineral buildup if you have very hard tap water. However, it costs more over time and is not necessary for most people. Filtered tap water through a pitcher filter is a cheaper middle ground if your tap water tastes or smells off.

What happens if I do not descale my coffee maker?

Mineral buildup slows the heating element, making coffee brew slower and taste weaker. Over time, scale can damage the heating element or clog the water lines, shortening the machine's life. Regular descaling every one to three months prevents this and keeps your coffee tasting fresh.