Answer: clean the pavers with a brush with a little soapy water.
White streaks may appear on pavers, as well as on other types of exterior siding. These are completely natural crystalline deposits that do not damage your pavement, except for its aesthetic appearance. So don't worry. It is useless to sprinkle them with water to make them leave, it will be ineffective. To get rid of it, it is best to clean the affected areas with a brush with a little soapy water. Avoid overly aggressive detergents or acidic chemicals as much as possible to avoid damaging your paving stone or damaging the joints. Likewise, the use of a high pressure cleaner is strongly discouraged. It is possible that the stains will return, alas, after a certain time.