C# Forms – remove column header in DataGridView

(sorry for links, not allowed to post images)

I have a 10×10 datagridview with images (black squares are images) in each grid.

I have a weird row at the top with a null image icon at the top.

https://i.stack.imgur.com/PNnbr.png

I have made inivisble all column and row headers in the properties

https://i.stack.imgur.com/R84v3.png
https://i.stack.imgur.com/xCzHn.png

10 Columns, all the same settings as the one showed:
https://i.stack.imgur.com/Ghxdj.png

The code to add the images in each row.

https://i.stack.imgur.com/xd12A.png

>Solution :

Clear the grid before adding rows:

this.gridMachines.Rows.Clear();