Everyone's RF environment is different so there's no "one size fits all" answer. Experiment with different filters to see if any improvement is realized. Consider also IFX: Press Func then 7(IFX). Move to a different location away from sources of electricity, any difference? If the "static" is sporadic there may be a digital voice station (DMR, NXDN, etc; common for UHF) operating on or in close proximity to the station you intend on listening to & if this is the case there may not be anything you can do depending on how strong the signal is