Fly one dot high on the glide slope, note touchdown rubber smoke, touchdown beyond that point. Behind any large jet!
Nope!
If you fly a dot high, you will put YOUR wake right on the glide path for the next airplane. Since the wake vortex goes DOWN and out, staying ON the glide path is best.
If you think you're so close that you want to "Fly one dot high", then go around and ask for more separation.