How to Remove Coffee Stains From a Mug

1. Fill the mug with equal parts baking soda and white vinegar.

2. Let it sit for several hours or overnight.

3. Scrub the mug with a soft cloth or sponge.

4. Rinse the mug with warm water.

Method 2: Using Dish Soap and Hot Water

1. Fill the mug with hot water.

2. Add a few drops of dish soap.

3. Let it sit for a few minutes.

4. Scrub the mug with a soft cloth or sponge.

5. Rinse the mug with warm water.

Method 3: Using a Commercial Stain Remover

1. Follow the directions on the product label.

2. Scrub the mug with a soft cloth or sponge.

3. Rinse the mug with warm water.

Tips:

* If the stain is stubborn, you may need to repeat the cleaning process several times.

* To prevent coffee stains from forming in the first place, rinse your mug with water after each use.

* You can also try using a coffee mug with a non-stick coating to prevent stains.