Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to create homemade brick cleaner [title] Combine cream of tartar and water to make a cleaning paste. [step] In a small bowl, combine 2 tablespoons (20 g) of cream of tartar with enough water to make a thick paste. Stir them together to completely incorporate the two ingredients.

Ending1: To make larger quantities, add more cream of tartar and water and mix it into a paste. [substeps] Cream of tartar, otherwise known as potassium bitartrate, is an acidic by-product of winemaking that can be used to clean and scrub metal, ceramic, stone, and other surfaces. Ending2: [title] Place mixture in a preheated oven to bake for 15 to 20 minutes. [step] Set the oven to 250 degrees fahrenheit (200 degrees celsius). Ending3: Use a clean rubber mallet to incorporate the paste into the paste. [substeps] Make sure that you're consistent as you work. Ending4: [title] Soak the brick cleaner in vinegar. [step] Place the brick cleaner and water in a large bowl.

Answer format: ending1/ending2/ending3/ending4