I don’t think they grow immune to being suffocated. The other cool part is that if you read up on other products, like, nuke em perhaps. There is information on people trying to replicate their product.
Take you jwa as the base, and add citric acid, some yeast, and one other thing (blue kush got my brain, sorry). 
You have a pretty good recreation of nuke em.
Add essential oils in the right combination, boom, another product.
If you want to change it up bro, you are only held back by your tenacity. What you have is the start of it all though, the wetting agent. Go ahead and create a 3 way combo and change it up on them every time.
I would recommend visiting the protocol 0 thread. It’s a very interesting and simple approach to avoiding bringing pests into you indoor grow.