How to easily remove vinyl tiles

How to easily remove vinyl tiles: "The previous owner of our house, unfortunately, tried to 'renovate' and 'improve' the recently refinished and refurbished original clear-vertical-grain fir floors by sticking self-adhesive vinyl tiles to them to create 'area rugs' of faux parquet and faux marble. After scraping, heating, and using a variety of solvents, I hit upon this far easier and relatively non-toxic method: dry ice."