What you should do is buy these: iPod Touch (4th Gen) Adhesive Strips so you can glue your screen assembly back on the rest of the iPod. Make sure all connections are OK and everything fits so you don't have to re-open it again.
We have a chance to guarantee our right to repair electronic
equipment—like smartphones, computers, and even farm equipment. This is a once-in-a-generation
chance to protect local repair jobs—the corner mom-and-pop repair shops that
keep getting squeezed out by manufacturers.
Join the cause and tell your state representative to support Right to Repair. Tell them you believe repair should be fair, affordable, and accessible. Stand up for your right to repair!