Questions about Zerostat use


Hello
I recently purchase a Zerostat gun (blue).There is no manual whatsoever so i have several questions regarding its use.The box says just to slowly press the trigger 12 inches from the record and then slowly depress it.
1.Should i point away when depressing the trigger?
2.Should i do it on each side of the LP?
3.Can i use it on cartridges and cables?If yes,how?
4.A small plastic piece that came in the box:is it just the protective cover or is it for something else?
I really appreciate your help!Thanks.
overhang

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