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You are saying that the water comes on by itself? What water pressure do you have?

Call Delta toll free help line

The Nike GPS monitor fits into your sneaker and you can track your progress on your iPhone or iPod with a special app. You can download the app from the iTunes app store.

http://nikerunning.nike.com/nikeplus/v1/pdf/English.pdf

I have always washed my sneakers in the washing machine, if they have air bubbles make sure that you wash them on a cold wash and not too hot as this can cause the bubble to expand and rupture.

It is unlikely that the bubble can be repaired but Nike does have a 2 year warranty depending on the wear and tear of the shoe, you could take them to the store you got them and see what they say.