You checked a gas leak with a naked flame? Now who's a muppet?
Headaches from a gas leak? WTF are you on about?
If a heat gun is going to generate enough heat to melt solder, then it is going to do the same harm as a blow torch. If you are too unskilled to use a blow torch without setting fire to the surrounding areas (gas leak detection notwithstanding
) then you should probably give up.
There's every need. We can't offer you a solution if we can't see the problem. What you deem necessary information and what a professional deems necessary information are very different things.
Two words..... Capillary Action.
But then you're obviously such a clever clogs you know all about that and have never ever ever had it happen to you.
This usually happens when a space cadet doesn't get the answer they were hoping for but persists to pretend to know better.
Now... I politely suggest you go and learn to use a blow lamp properly.