We have Travertine tiles throughout our home. We’ve been here 12 months & the house is 10 years old. The tiles in some areas are quite dirty (kitchen, showers, walkways). I’ve had quotes for cleaning from several companies. Most want to hone, clean then seal the floor or at the very least clean then seal. One fellow said it just needs to be professionally cleaned with a rotary scrubber and not sealed. The cost has varied significantly and I truly don’t know what to do. Any advice would be appreciated.