he stains of coffee in a thermos tend to add a taste of the old coffee any other liquid you put in the container. The only way to remove this flavor is getting rid of stains. Check out below some cleaning methods.
1-Fill the thermos with hot water up to 1.2 cm from the mouth. Pour a denture cleaning Tablet effervescent. Let the inside of the bottle to soak in the solution for 4 hours (or more, if the stain is really difficult to remove). Wash the thermal carafe with warm, soapy water and rinse well.
2-Fill the thermos with hot water by adding two teaspoons of powdered dishwashing detergent. Stir well until dissolved completely. Soak for 30 minutes to 1 hour, depending on the severity of the coffee stains. When this time there is elapsed, wash the thermal carafe with warm water and SOAP and rinse with warm running water.
3-Fill the thermos with hot water and add two tablespoons of white vinegar. Stir the mixture and leave to soak overnight. Rinse the bottle in the morning and wash it in warm water to remove the vinegar smell.Rinse with warm running water.
4–Fill the thermos with hot white vinegar (heat the vinegar in a bowl suitable for microwaves separately and pour the hot liquid in your thermos). Add one tablespoon of baking soda and stir. Let this mixture for 4 hours and wash your bottle. According to novowaterbottles, take a bottle brush and remove the remains of the coffee stains. Wash the container in warm water and SOAP and rinse with warm running water to remove the vinegar smell.
5-Fill the thermos with crushed ice. Add the juice of a lemon and a tablespoon of salt. Mix well to distribute the ingredients. Let this mixture rest overnight. Remove the ingredients and rub the inside of your thermos with a brush, allowing the salt and lemon juice to do the work, leaving the rest for 1 hour. Wash the thermal carafe with warm water and SOAP and rinse thoroughly with warm running water.