This is to remove excess characters from a string. It can be enhanced with options or changed depending if you want spaces or not etc.

Function fixchar(s As Variant) As Variant
 
Dim a, b, i As Integer
    fixchar = ""
   
    
    If Len(s) = 0 Then Exit Function
     
    For i = 1 To Len(s)
        b = Mid(s, i, 1)
       
        
        ' No Spaces: "[A-Z,a-z,0-9]"
        ' Spaces OK: "[A-Z,a-z,0-9 ]"
       
        If b Like "[:,/,A-Z,a-z,0-9 ]" Then
            fixchar = fixchar & b
        End If
    Next i

End Function

There is a more sophisticated function here where you can just run a macro on a selection instead of using a function as above.