Is that a leak in the air mattress I hear?
Don't worry, you can fix your air mattress with an ordinary bicycle inner tube repair kit and some sandpaper, all in less than 10 minutes!
Step 1: Tools + materials
Step 2: Sand and score
There are a variety of methods such as using soapy water to see where bubbles for, or submerging your mattress in water to find where the leak is coming from. In most cases the leak will be obvious enough to find by sight or sound.
Once your leak has been located deflate your mattress.
Puncture not in flocked area of mattress:
If the leak is not in a flocked area of your mattress proceed to the next step.
Puncture in flocked area of mattress:
If your leak is on the flocked upper area of your mattress start gently sanding away the flocked surface to around the leak to reveal the smooth rubberized surface below. By removing the flocked surface around the leak you are creating a surface which will allow the patch to create a good seal.
Ensure not to sand through mattress or make the leak opening too large from excessive sanding.
Then, use a vacuum or damp cloth to clean the area of debris.