When I use my whitebox stove in subfreezing temperatures (20F), (3cup h2o, 1.5 fl oz heet, closed cell foam under heat reflector), it takes 2 minutes for the jets to flare. Then I read from people that they use a priming pan and then the whitebox flares in 10 seconds. Is this also true at subfreezing? How do you know how much priming fuel to use at subfreezing?

Thank you,