Please choose the correct ending to complete the given sentence: Health: [header] How to use an inhaler [title] Remove the cap. [step] The cap is a small covering located over the mouthpiece of the inhaler to prevent foreign objects from getting in the inhaler. Pull the cap to remove it and set it in a safe place.

Ending1: Be sure to wipe the cap well with a damp, dry cloth before storing it in your purse or other place you want to keep the inhaler and medicine. [substeps] You may want to put the cap down in case you accidentally exhale too much or use any liquid. Ending2: [substeps] An uncapped inhaler can pick up germs and debris, which you will then pump into your lungs. Make sure that you don't lose your cap while you're using your inhaler. Ending3: Keep it in place by not touching or removing it. [substeps] After taking the cap off, the filling liquid will flow into the inhaler. Ending4: You should also put the cap back on after inserting the inhaler and making any necessary adjustments. [substeps] While having the cap removed will avoid you picking up foreign object, removing and rebuilding the cap can still keep the inhaler safe.

Answer format: ending1/ending2/ending3/ending4