Hey Sukhenkoi,
You shouldn't have to go and get a non-sanded grout to fill those small grout lines. When you are grouting just be sure fill them and go over them until they good. If you don't think that will work you can get the matching grout in a caulk tube as a non-sanded and squeeze it in. - Gregg
You shouldn't have to go and get a non-sanded grout to fill those small grout lines. When you are grouting just be sure fill them and go over them until they good. If you don't think that will work you can get the matching grout in a caulk tube as a non-sanded and squeeze it in. - Gregg