Please choose the correct ending to complete the given sentence: Health: [header] How to clean a wood pipe [title] Run a pipe cleaner through the pipe before you use it. [step] Even if you have cleaned your pipe after the last time you used it, you should always clean it before you smoke it. Take a pipe cleaner and run it through the pipe.

Ending1: This helps get rid of any remaining ash or dottle. [substeps] Gently knock the pipe in your palm to get the debris from the bowl. Ending2: Repeat this every few hours to keep up with cleaning time. [substeps] Wax the pipe when you are finished using it. Ending3: This will help remove any pollen stuck to the pipe as you smoke. [substeps] If you do not have a pipe cleaner, you can purchase a pipe cleaner from a hardware store. Ending4: What's more, if your pipe is in a bowl, run tap water through it instead. [title] Sit your pipe cleaner or water bottle upright and open it.

Answer format: ending1/ending2/ending3/ending4