my new psu has a bit of clear plastic in it that from external observation appear to have something to do with the airflow in the psu but it appears to be slightly loose causing it to sometimes rub on the fan causing an annoying noise
i cannot open the psu as that would void the warranty
what should i do?
While keeping your PSU unplugged, you could take a screw driver and push the plastic down a little bit. Just make sure the plastic doesn't touch anything when you do, don't want to risk anything melting the plastic
If this doesn't solve your issue, you may want to exchange it