Everyone is going to think I am nuts for going along with you on this but here is some helpful hints if you are serious:
Make sure the clippers and a pair of tweezers are clean and pour some alcohol over them.
Then, when you clip the stitch with the clipers, clip one side of the knot, not both. Then use the tweezers to get ahold of the knot and tug. be careful you do not get some newly healing skin, too.
Clean the area well when you are done and use something like Nerosporin.
Really, it's not that bed, folks if you are SURE it has healed suficiently.