You can get rid of plaque using table vinegar.
It should be mixed in equal quantities with plain clean water and heated in the microwave.
The solution should be left in the cup for several hours.
After 3-4 hours, you need to wash the dishes in the usual way and also rinse them thoroughly under running water.
It is believed that this method will give the cups freshness.
Lemon juice and baking soda are also effective.
First, the dirty surface should be moistened with lemon juice, and then sprinkled with baking soda.
After a few minutes, you need to carefully wash the dishes with a sponge.
This method will not only whiten the dishes, but will also give the cups a light and pleasant citrus aroma.
It is permissible to use only soda. It is better to mix it with water beforehand to get a thick paste.
The solution should be applied to the stains for 20 minutes. Then you can wash the cups. There will be no trace of the plaque.
Earlier we told you how to descale a kettle.