Grout got into the back of glass splashback

Hi, I see your concern with this one. I assume then that the tiles start from the top edge of the glass splash-back? It’s of little help now, but the splash-back should have been sealed with clear silicone before the tiling was even started, but too late now. I would recommend you take photo’s of the problem areas as they are now. Then try getting in touch with whoever fitted the splash-back and ask their opinion. I think it will need to be removed, cleaned and then put back. If the work comes with a cost, then your tiler should contribute as he caused the problem and you have photo’s and a quote to make it right again.

Firstly he should not have grouted between the tiles and the glass splashback. It should have been siliconed for two reasons. One, so you don't get grout seeping behind the splashback as in your case. The sceond reason is the glass splashback needs a little bit of room in case it expands a little. If it's grouted it can't do that and could possibly crack. As it's his fault he should really pay for your glass to be removed, cleaned of grout and reinstalled. If it damages the tiles it should be down to him to replace the tiles too.... Cost free!

You can can put a decorative metal or wooden flat trim around the affected area along the outer edges and this would voter it up nicely Donovan

You will have to get in touch with your tiler first and ask him his recommendation to put the work right you will have to take a row of tiles out and silicon or replace glass good luck?