Fully inflate the mattress
Listen for hissing sounds
Feel for escaping air with your hand
Run your hands over seams, valves, and corners
Spray the mattress with soapy water
Look for bubbles forming
Submerge small sections in water if possible
Mark the leak spot with tape or a marker
Check the valve for leaks
Inspect for punctures, cuts, or worn areas
Press on the mattress to force air out through the hole
Use a damp cloth to help detect airflow
Search the mattress in a quiet room
Recheck the suspected area from different angles