dont do it, i tried last night and destroyed my digitizer!
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the entire ipod is fragile and can be destroyed very easily. I took mine completely apart last night before is discovered I could not separate the glass from the digitizer. I ordered a new assembly on eBay and I am returning the lcd screen i bought. It was a waste of money. upon putting it back together i destroyed my digitizer from trying to heat the glass off. buy a whole assembly!