Let's try the world's first anti fingerprint coating kit ' Fusso SmartPhone' that let you reproduce touch screen anti fingerprint oleophobic coating as same strength as manufacturer's original coating. ( www.apeiros.jp/Fussode_COAT_2 or find it on amazon.com )

Actually iPod Touch 4G seems to use gorilla glass for cover glass with same anti-fingerprint coating although LCD is different from iPhone 4/4S retina. If it's Gorilla glass, it is made of aluminosillicate. If oleophobic anti-fingerprint coating is worn off already, you can renew by using the world's first anti fingerprint coating kit ' Fusso SmartPhone ' that is applied to many smartphone as default coating. ( www.apeiros.jp/Fussode_COAT_2 or search on Amazon.com ).