Sorry Bert, you wrote 'cleaner' not 'primer', so I thought you meant cleaner
Have you tried denatured alcohol? Acetone? Turpentine? (or 'Turpatine; as some call it now)
Test on some hidden flooring if you can first, especially with acetone.
--hand cleaner? Bar Keepers Friend? Or just plain old soap and water? Funny thing about chemicals and cleaners, while plain old tap water will clean up a dried coffee stain, alcohol won't touch it!