There are different possible causes for a squeaky shoe. The most common, particularly in sneakers, is due to friction between the tongue and the quarters of the shoe. This can be easily fixed by putting a little talcum powder below the tongue of the sneakers.Another cause is due to an air pocket between the insole and the outsole. When you walk the air is pressed and produces the sound, as in a squeaky toy. It can be caused by altitude or extreme temperature changes. To fix this, you can take your shoes to the cobbler and tell him to put the sole in the vertical press for a couple of hours until the air pocket is completely flattened. Another cause is when the steel shank gets detached from the insole. It won't cause any structural issue as the shank is still sandwiched between the insole and outsole but the sound can be bothersome. To fix it, a cobbler needs to disassemble the sole and put new rivets in the steel shank. Before you do anything, please contact Customer Service and they will advise you if your situation is covered under the warranty.