Textbox Datasource

I have a form where the user searches an access DB, the user will use this all day. Doing new searches all the time.

VB Code:

Private Sub cmdStart_Click()
    'Free Memory
    Set txtContactID.DataSource = Nothing
    Set txtFirstName.DataSource = Nothing
    Set txtLastName.DataSource = Nothing
    Set txtHomePhone.DataSource = Nothing
    Set txtWorkPhone.DataSource = Nothing
    
    If rsContacts.State = 1 Then
        rsContacts.Move 0
        rsContacts.Close
    End If
    Set rsContacts = Nothing
    
    'Open new data
    Set rsContacts = New ADODB.Recordset
    rsContacts.Open "SELECT * FROM Contacts WHERE LastName = '" & txtSearch.Text & "'", dbContacts, adOpenStatic, adLockOptimistic, adCmdText
 
    Set txtContactID.DataSource = rsContacts
    Set txtFirstName.DataSource = rsContacts
    Set txtLastName.DataSource = rsContacts
    Set txtHomePhone.DataSource = rsContacts
    Set txtWorkPhone.DataSource = rsContacts
End Sub

It works fine... Almost..

After using it for several hours it becomes really slow. If you restart the app, it speeds back up again.

I modified it to run 100 searches in a row and time each search. Indeed it does get slower and slower and slower.

Above is the ONLY code executed between searches. I cannot figure out how to fix this. I know I could just set the text of the textboxes instead of binding them to the recordset, but I'd really prefer not to do that..

Any help would be awesome!