Housewives who have ever had to wash a thermos from dark deposits in their lives know first-hand how difficult it is to get rid of dirt.
However, with this method, cleaning any container, even with the narrowest neck, will no longer be a problem for you.
True, you can’t do it without some sacrifices – you’ll need to give up a metal sponge in the name of cleanliness, but let’s take things in order.
The metal mesh should be cut into small pieces with scissors, and then placed in a thermos.
Add a tablespoon of baking soda and the same amount of powdered detergent here.
Now fill the flask a third full with boiling water, close it and shake it vigorously in different directions for a couple of minutes.
Take a rest, put the thermos aside, and then repeat the procedure again - it is worth doing this several times, and it is better to leave the thermos overnight.
In the morning, use the thermos as a shaker again, then drain the dirty liquid and evaluate the result. If you are not satisfied, without removing the sponge pieces, pour in the same amount of cleaning agent and repeat the cleaning operation.
