Just blowing on it fixed it? Haha. If only so many more technical problems were that easy to fix! 🙄
If it stops working, the best fix in my opinion is this: take some rubbing alcohol (preferably 90+ higher alcohol percentage), and put literally just one drop (no more) in the middle of the home button. Then take a new pencil and use the eraser end to press the home button quite a few times. Call it ten or so. Then take a paper tower or something and wipe off the access alcohol. Alcohol like that is quick to dry, don't worry about whatever is left under the button.
My iPad 2 home button has been fixed many a time using the same method. Cheers!