Put the mixture in a spray bottle and spray the grout in between your floor tiles. Wait for the vinegar solution to stop bubbling and then scrub the grout with a scrub brush or toothbrush. Once the grout is clean, mop the tiles with water to get rid of any leftover vinegar solution.
1 Prick all over with a fork: Prick the potatoes in a few places with the tines of a fork. This allows steam to escape from the baking potato.  Bake the potatoes: You can bake the potatoes directly on the oven rack, or you can place them a few inches apart on a foil-lined baking sheet. Bake the potatoes for 50 to 60 minutes. Flip them over every 20 minutes or so and check them for doneness by piercing them with a fork.
Roasted potatoes take around 50 minutes to cook. You may need to adjust this cooking time to suit your preferences. As a general rule, the longer you cook the potatoes, the crispier they will be. Of course, overcooking leads to dried out or burned potatoes. Don't forget to allow 10 to 15 minutes to wash, peel and cut the potatoes. For a gas oven, heat it to 350 degrees Fahrenheit for roasted potatoes. The oven should be at the correct temperature before you put the pan of potatoes into it. If you're using a fan oven, set it at 400 F.