You mentioned the "the thumbnail test", if you did this you have just dulled the edge of your razor. It needs to be sent back out. The razor is made for hair not thumbnails, the only time I ever use this test is at the antique store, flea market or sale to check for minor chipping. If you had a barbers hone you might be able to correct this, you may even be able to with a prolonged session on the strop. Its a live and learn world. Best of luck!