Refresh/Recalculate Custom Color Function Automatically

I have this spreadsheet with tons of vba coding. The intent of the spreadsheet is to track invoices as it goes through the approval process. The part that is giving me issues is the first and seventh column. The seventh column is actually a formula that returns how many days between the invoice due date and today’s date. The coding works fine, with one small glitch. Once the dates have been entered, the first column (which contains the color-coding) stops changing colors. What it should do is anything with 0 or less days remaining should show red, between 1 to 10 days, show yellow and anything above 10 days, show green.

So if I enter an invoice with 11 days remaining to pay, it will show green in the first column, but when I open the spreadsheet tomorrow, it remains green, even though it should show yellow.
What I want it to do is refresh every time it is opened, or every day, which ever is easier. There are reasons that we cannot use conditional formatting, one of them being that we want to expand the color coding system to more than 3 colors soon, but I want to get this working correctly first.

This is what I have. I cannot attach the spreadsheet because it contains confidential information.


Private Sub Worksheet_Change(ByVal Target As Range)

Dim h As Integer
Dim i As Integer
Dim j As Integer
Dim lastRow As String
Dim fRowValue As String
Dim gRowValue As String
Dim mRowValue As String
Dim rRowValue As String
Dim uRowValue As String
Dim paidCheck As String
Dim stringAnswer As String
Dim testAnswer As String
Dim testDate As String

Application. ScreenUpdating = False

lastRow = ActiveSheet.Cells.SpecialCells(xlCellTypeLastCell).Row

For j = 8 To lastRow
If Not Intersect(Cells(j, 2), Target) Is Nothing Then ...................