Referring to Charles Boyle and O'Doul's, I find there is a temp/dew point condition at which the fuel doesn't atomize. Venturi- choking fills the case with raw fuel, but, it doesn't atomize (vapourize?) and if the glow element is inspected, it may well be discovered to be dry as a gourd.
Rarely is it totally flooded, in that case, the circumstance must be addressed, of course...
Don Hutchinson uses a plastic nose- spray- squeeze bottle with fuel with which exhaust priming can be accomplished. Spray in a vapour, not raw liquid. Then back flip it...trying to avoid getting whacked on a cold day.
A caution...take care when spraying the flammable mist into the exhaust with a red-hot dry glow plug in there. Maybe remove the battery first.
FWIW,
dg
Edit: Don H also utilizes a skull and crossbones, and a POISON label prominently displayed on the plastic squeeze bottle, considering it a must!