Just buy regular Naphtha from Home Depot or Walmart.
The new lighter fluids use other chemicals instead of Naphtha and, IMO, that needs more time to establish its reliability over longer periods for len and camera cleaning.
I have had no issues with Naphtha, Hydrogen Peroxide (H²0²), Isopropyl or Ethanol Alcohols, Eclipse Lens Cleaner or tiny, steel needles, with acetone, in miniscule amounts, only on metal on metal things like loctite type glue, on little screws and filter rings no metal lens l threads, NEVER EVER ON OPTICS!
Get some Swiss watchmakers 'cat whiskers' oil delivery probes, with their special tips
)
in all four sizes and start with the smallest, if you cannot buy the full set at once, a tool which might need repeated 'dippings' in a drop of watch or very light camera oil, but will prevent you from drowning a screw head, filter thread, or mechanism in excess oil.
Cheers