VB.Net clear datagridview rows without the headers

I have a datagridview with columns added from the designer, the data for this grid will be selected from the database and will be directly bound to the grid. For this purpose I have DataPropertyName to the column names of the database table.

I am setting the datasource like this :

dgPayment.DataSource = myDatatable

Now I need to clear the rows of the datagridview without removing the headers of the datagridview. I tried using dgPayment.Rows.Clear(), but this prompted a error because the grid is bound & therefore the rows cannot be manually altered. I also tried setting the datasource to nothing like this :

dgPayment.DataSource = Nothing

But this removes the headers too, which doesn't need to happen because they are the column headers that I added using the designer. How can I clear only the data without clearing the headers.