That’s funny right there. The pic of the web and spider was on the steering wheel where the air bag is. Spraying watery stuff on that might get weird results. Maybe you could just gently drive into a fireplug and set the bag off. That should show Mr Spider?
Considering the $$$$$ for replacement/repairs due to a bag "event", it might almost be a wash with settin' fire to the thing.
Certainly would be a more effective way to get that **** spider.....