I started snipping again yesterday.( I seems to lose the length of what I got from snipping a few months ago.) Here are some thoughts about snipping:
When I snip, I push the tongue with two fingers on both sides of the membrane, thus the frenum membrane in the middle will protrude more for easy snipping. As we snip more, the tongue will go further back by our pushing. In my case the frenum extends to area close to my tongue tip. Eventually we cannot snip this part because the tongue is far back when I push it. I believe it's better to snip the upper part first, so I can make use of the frenum for a longer time(and stay away from more dangerous methods that we need once the frenum membrane is gone)