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.
In a pot, heat water until it boils. Once it boils, add in your potatoes. After about 20 minutes, you can try forking in your potatoes to see how tender it is. Now, another factor on the length of cooking potatoes is how big your potatoes are. Of course, if you use really small potatoes, they will become tender easily.