BabyFacedFinster
Anything worth doing, is worth overdoing.
You can use a wooden chopstick to push out the old screen. You can put a new one in using the same process. Use your e-pick to measure distance from the end of the glass.
Do a search, some pages back @Ratchett made a tool to make them.
I find the screens really durable I'm using the same screen that I've been using for 6 months on 2 of my mouthpieces.
I clean the mouthpiece and screen at the same time by soaking in Everclear. I put the mouthpiece in a plastic container that the mouthpieces come in and soak a few days. I switch back and forth between 2 stems. I use the same alcohol each time.
I think he is talking about a fixed glass screen gong. I have never owned one and don't know if the screen is removable.
I know some like the fixed screen gongs for vaping concentrates. I prefer the adjustable gongs which are cheaper and allow you to adjust the depth of the mesh basket screens for the amount of herb you wish to pack.
If you end up keeping the fixed screens then while you might be limited in how much you can pack, know that it only takes very little to get massive hits. As some say here, less is more with the nano.