It may well be me and my technique but is there an easy way of undoing the 'Lift The Dot' fasteners? Some seem to open easily on my (cloth) hood and then there are the real b******s that will not budge. On occasion I have had to resort to carefully levering them. This does not somehow seem to be what I am supposed to be doing. Any advice on ways of getting them to undo in a manner that looks half elegant and doesn't involve red face, sweat, swearing and a screwdriver?