The flash backs of your kitchen needs to be clean and beautiful. Another important thing to consider is that they should be clean and devoid of moulds.
If there is mould it will smell. Grout is the best place for mould growth as it will allow particles of water in between the minute crevices in grout. The best way to give your flash backs a modern and clean look is to fix new love glass splash backs. You can have glass worktops and shower screens too. They are all beautiful and easy to clean and available in the colors of your choice.