Most of these so-called gas dusters (aka canned air or compressed air) actually contains inert gases such as difluoroethane, trifluoroethane or tetrafluoroethane. Are these chemical compounds safe or harmful to vinyl records? I am asking because I am planning to use them as a pre-cleaning agent before applying record-cleaning fluids (e.g., Audio Intelligent Vinyl Solutions, Disc Doctor, etc.) on vinyl surface with the use of a record brush or pad. Is it safer to use these gas dusters as pre-cleaning agent than using a soft brush (e.g. paint brush)? Thanks Hoffmanites!!