How to Clean a Thermos
Using a thermos is a brilliant way to always have your hot drink of choice on hand. It’s an excellent pick if you travel frequently and allows you to save some money and save the planet! It is also sure to keep your beverage warmer for longer and this is hugely important for those busy days when you hardly get a moment to yourself. Disposable coffee cups are known to add excess waste to the environment and having a reusable coffee flask is a great way to do your bit for the planet. Nonetheless, these flasks can be tricky to clean due to their shape. It’s important to keep your thermos clean and that’s where we can help you. Knowing a few tricks in terms of cleaning can keep your thermos sparkling as if it was new and will enable you to get rid of those coffee stains and smells.
So, let’s have a look at how to clean a thermos bottle and ensure that your flask is as good as new for every morning cuppa! All our recipes utilize household ingredients and items and will thus be quick and easy to do.
A Few DIY Ways to Clean Your Thermos
While thermos flasks might be a little tricky to clean, there are a number of easy ways to complete this task. These have been well tried and tested and utilize every-day ingredients that you would find in your home.
- Use some ice and salt
This is one of the easiest ways to clean your thermos. You will need some ice (crushed is better but cubes are perfectly fine) and about 3 tablespoons of salt. Simply fill the thermos with ice (about a third of the flask should do the trick) and quickly add the salt on top. Larger salt granules like Kosher salt will work well. Pop the lid back on and shake the thermos vigorously – (like those bartenders do when they are making a cocktail!) Not only is this a great arm work out, but the salt and ice combination work wonders when it comes to cleaning a thermos. The salt works as an exfoliant and will be able to get rid of any stains and the ice ensures that your flask isn’t damaged. Once you have given it a good shake, simply rinse your flask under the faucet to ensure that all the salt is gone. (Because no one wants a salty cup of morning coffee!)
- Baking soda and vinegar (a particularly great way to get rid of stains!)
This is a great option if your thermos is full of coffee or tea stains, or if you want to get rid of that coffee smell out of your flask. You will need half a cup of white vinegar, a tablespoon of baking soda, and a little hot water. Simply pour your vinegar into the thermos and sprinkle the baking powder on top (it will fizz, and this is a sign that a chemical reaction is taking place). When the fizzing has stopped, fille the thermos with warm water and allow the mixture to stand for a while.
NB: DO NOT CLOSE THE LID. The chemical reaction between the baking soda and vinegar can be super reactive.
After about 10 to 15 minutes give your thermos a good scrub with a bottle brush to ensure that all the stains come off.
Rinse your thermos well with some dish soap to ensure you’ve got rid of all the baking soda and vinegar. Let it air dry and if the vinegar smell remains, then simply give it another rinse. And then, voila, you are ready to enjoy a brand-new thermos that is free from any lingering coffee or tea stains.
- Dishwasher powder or denture tablets
Dishwasher powder offers another brilliant way to clean your thermos. Powder is superior to liquid as you need the abrasive qualities to truly clean the flask and remove stains. Add about a tablespoon of the powder to your flask and then fill it up with hot water. Shake the thermos vigorously and then take the lid off and allow the mixture to settle. You can leave it for a few hours or overnight and simply rinse thoroughly with soapy water before use.
Denture tablets also work wonderfully since they are designed to thoroughly clean dirt and debris. Pop a tablet or two in your flask and add some water. Leave the cap off and allow them to work their magic. After a few hours grab a bottle brush and give the flask a good scrub. Rinse it well and it will sparkle as if it was new.
The Thermos Gasket or Lid
A note on the thermos gasket: It is important that you also soak your thermos gasket and lid in the above solutions. These parts of the flask can build up with debris and old coffee and thus need a good cleaning. You can always submerge your lids in a bowl of the solution and leave them to soak for a few hours. Just always ensure that you rinse them well after they have soaked as you don’t want to be consuming dishwashing liquid, or denture tablets.
Cleaning your thermos is a simple feat and these DIY methods are bound to leave your thermos sparkly and new no matter how many hot drinks you consume on the daily!