Unfortunately, a way for tea and coffee lovers to protect themselves from the unattractive dark film that remains on their teaware after drinking tea has not yet been invented.
This is explained by the fact that tea and coffee contain natural coloring agents.
Although regular dishwashing detergent is not able to cope with such stains, there are still several products that will make your dishes crystal clear again.
One of them is completely ordinary kefir.
To get rid of plaque, you need to fill a cup with a fermented milk product and leave it like that overnight.
When the morning comes, all you have to do is rinse the mug.
Kefir in this version of cleaning can be replaced with cola. The plan of action with soda is exactly the same - pour, wait, rinse.
Finally, you can fix the situation with alcohol or alcohol tincture. Of course, you won't need a cup of this product - just dip a cotton pad in alcohol and wipe the inside of the dish with it.