Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to locate a leak in an air mattress [title] Remove sheets and bedding from the air mattress. [step] You won't be able to see holes or tears in the mattress with the bedding on. [substeps] Move the bedding to a safe place, away from the area where you will look for leaks so that its out of the way.

Ending1: [title] Move the air mattress to a place where you have room to maneuver. [step] You will need to be able to walk around the mattress, flip it, and inflate it. Ending2: [title] Locate the leak by looking at a thumb-sized hole in the bottom of the mattress. [substeps] Wait for a rapid pulse or other sound to accompany the measurement. Ending3: Throw away the sheets that are used to cover the mattress. Check spots where additional sheets may trap trapped air. Ending4: Also ensure that you wear gloves to protect your hands and face. [title] Remove the top two sheets from the mattress.

Answer format: ending1/ending2/ending3/ending4