Removing adhesive from hardwood floors without damaging the finish can be done with a few simple steps. First, use a putty knife to scrape away any excess adhesive. Then, dampen a cloth with warm water and dish soap and gently rub the area to remove any remaining residue. Finally, use mineral spirits on a clean cloth to wipe away any stubborn spots of glue that remain. Be sure not to scrub too hard or leave the mineral spirits on for too long as this could damage your floor's finish. With these steps you should be able to safely remove all traces of adhesive from your hardwood flooring without causing any harm.