How do I erase my ipod touch 4th generation?

my ipod is all cracked up and half of the screen doesnt work... :( and i forgot my apple id and password. help please i need to reset everything!! or:

my ipod is all cracked up and half of the screen doesnt work... :( and i forgot my apple id and password. help please i need to reset everything!!

or:my ipod is all cracked up and half of the screen doesnt work... :( and i forgot my apple id and password. help please i need to reset everything!!

or:Recover your data with iCloud or iTunes. or there are some software in the market can help you about it.

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