What does "Renew Lease" for iPod Touch mean?

My grandparents don't want me to have wifi on my iPod touch, so they have a security lock on their wifi. I found out the passcode to the wifi connection, but now it isn't working. I have tried looking everywhere for solutions to get the Intrenet to work, but they all say tap renew lease. What does renew... show more My grandparents don't want me to have wifi on my iPod touch, so they have a security lock on their wifi. I found out the passcode to the wifi connection, but now it isn't working. I have tried looking everywhere for solutions to get the Intrenet to work, but they all say tap renew lease. What does renew lease mean, and what will it do? Will it possibly rat me out to my grandparents, by messing up the wifi connection? Help, soon
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