How to repel stink bugs from coming into office

Hi all - I constantly find stink bugs in my office at work. I've reached out to maintenance but they just shrug their shoulders about it. I was reading that plugging holes and peppermint oil/water mixtures sprayed around windows/siding where they might hide could do the trick. Unfortunately, I don't think I can plug any holes myself because of the age of the building and the air conditioner in my office (it doesn't have a filter, so things can probably crawl through it, but I did buy flex tape to seal the edges). I don't want to kill them, just stop them from coming into my office. Are there any better methods?