Sub OterDoublons()
Dim der As Long, j As Long
Application.ScreenUpdating = False
With Sheets("Feuil1")
If .FilterMode Then .ShowAllData
For j = 1 To Range("ah1").Column
der = .Cells(.Rows.Count, j).End(xlUp).Row
If der >= 2 Then .Cells(1, j).Resize(der).RemoveDuplicates Columns:=1, Header:=xlYes
Next j
End With
End Sub