Just a note. Apple no longer allows you to buy the replacement kit anymore They want you to have to pay a $20 per pad repair cost in the apple store. I was able to escalate my issue with an apple phone tech until a manager ordered me a kit but the regular sales people on the phone don't have the option themselves.
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Also if you buy them online make sure you're getting the adhesive glue with it. Otherwise you'll end up using something not ment for the pads and it will degrade faster.
Just a note. Apple no longer allows you to buy the replacement kit anymore They want you to have to pay a $20 per pad repair cost in the apple store. I was able to escalate my issue with an apple phone tech until a manager ordered me a kit but the regular sales people on the phone don't have the option themselves.