Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean a shower curtain [title] Place the shower curtain or liner into your washing machine. [step] To start, remove the shower curtain from the wall in your bathroom. Then, place it in your washing machine.

Ending1: Fill it with water and agitate the shower curtain or liner gently to work the water into the individual threads. Add baking soda to the water and agitate the shower curtain and liner to remove the baking soda. Ending2: Fill the washing machine with lukewarm water and use caution to avoid splashing the water. To keep dust and dirt from falling from the curtain top, you can secure it to a frame or mounting surface. Ending3: [substeps] Make sure you remove any metal hooks that may be on the shower curtain before placing it in your washing machine. [title] Place one or two towels into the washing machine. Ending4: Use cool water to agitate the curtain but do not squeeze the cover. This will make it easier to rinse the shower curtain once the contents spill out.

Answer format: ending1/ending2/ending3/ending4