Between the spit up and drooling I feel like I go through 4-6 bibs a day. I usually change them after there is a significant amount of liquid on them ( it grosses me out to leave a soiled bib on him and it gives him neck "cheese"). I've found that basic bibs just soak through to his shirts so I use the teething ones with waterproof liners (those save me from even more laundry).
How many would you say you go through?