I was just exploring Underrail and I discovered a nice counter to crawlers - Stasis. If you use Stasis after you have been stung and the crawler responsible for it goes on the ceiling, it will come down the next turn thinking you're paralyzed. It also has the added benefit of attracting the rest of hidden crawlers nearby. When Stasis ends you'll still have 2 turns to blast the creepy crawlies back to hell, where they belong! Not sure if this is a known thing, just thought I'd share it, so that ppl can avoid the problems I used to have with them.
