Not necessary.

FataMorgana

what should i do? neem oil?

No need to do anything. They will deliquesce of their own accord. It is a sign of organic matter in the soil and possibly a bit too much moisture.

So do we do less water?

Impossible to answer. We know nothing about your problem. The original post is from 9 years ago. Start a new post with your own question and provide pictures and relevant information such as location.