I've had a mirrored backsplash behind my stove for 8 years now and I still absolutely love it. Easiest surface to clean, I have used Windex or even ceramabrite or even whatever was in my hand for cleaning my cooktop stove i.e., Corning's Cleaner and conditioner. No grout lines no difficulty, if something is caked on the surface, then I use a glass scraper that you would use to scrape off your granite counter. My other backsplash wall (behind the sink) is also glass, but a coat of "tomato" colour of paint behind the glass, what an impressive professional look, just like McDonald's glass wall panels. Follow the trends, visit McDonald's for ideas, after all they do have expensive designers working for them.

is your backsplash tempered glass so the heat does not affect it?