We contracted Elston Cleaning Service to clean the Artisan Building at the Illinois State Fairgrounds (one of the few approved cleaning services at the Fairgrounds) following a wedding reception that we hosted. They were very responsive and professional from the moment I initially contacted them, to following-up with us as the event got closer, and executing their services promptly and thoroughly. One of the things I especially like about this service is that they offered a couple of levels with different prices.