Seems like the Illinois Supreme Court upheld the Boynton V. Private I Home Inspections.
This means that Illinois home inspectors can limit their liability so as not to exceed the home inspection fee. All you have to do is place that verbiage in the inspection agreement. This is not only a protection against you missing something, but also against negligence, as this case calls out.
I can’t find the Supreme Court paperwork, but here is the Appelate Court ruling, which was simply affermed by the Supremes.
Hope this helps;