DataGridView causing error

Private Sub UpdateGrid()
        Try

            If Me.DataGridView1.IsCurrentCellDirty = True Then
                Me.DataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit)
                Me.BindingSource1.EndEdit()
            End If

            Dim myBuilder As SqlCommandBuilder = New SqlCommandBuilder(adapter)
            myBuilder.GetUpdateCommand()
            adapter.UpdateCommand = myBuilder.GetUpdateCommand()

            For Each row As DataRow In table.Rows
                If row.RowState = DataRowState.Modified Then
                    row("UserID") = USER.ID
                End If
            Next

            adapter.Update(table)


        Catch e As SqlException
            Debug.Print("SQL Err - " & e.ErrorCode)
        Catch ex As Exception
            Debug.Print(ex.Message)
        End Try

    End Sub

Visual Studio 2010 - VB.NET

My application is used in a manufacturing production environment.

One essential activity is controlled/changed by use of a DataGridView control.

It appears that after updating this control, somehow (on rare occasions) a blank space is being appended to one of the underlying columns in SQL server.  The code that loads and updates the control is attached.  the field affected is called sterileNo.  

Has anyone got any suggestions?  Would I be better to use code to explicitly update my database for each ro rather than using a BindingConrol?

Thanks

Private Sub SetDataGridView()
        Try
            ' Set up the DataGridView.
            With Me.DataGridView1

                .AutoGenerateColumns = True

                ' Set up the data source.
                BindingSource1.DataSource = _
                    GetData("SELECT * FROM sterilecontrol WHERE sterileno='" & _
                    Trim$(Me.txtSterileNo.Text) & "' AND steriledate='" & Me.dtpSterileDate.Text & "'")
                .DataSource = BindingSource1

                ' Automatically resize the visible rows.
                .AutoSizeRowsMode = _
                    DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders

                ' Set the DataGridView control's border.
                .BorderStyle = BorderStyle.Fixed3D

                ' Put the cells in edit mode when user enters them.
                .EditMode = DataGridViewEditMode.EditOnEnter
            End With
        Catch ex As SqlException
            MsgBox(ex.Message)
        End Try
    End Sub