I have used a lighter, but it is super easy to scorch.Thanks Sean.
Yeah, I like those one step soldered thingies too.
Have you tried heating then with a small flame at all please?
Or have you come across a neat little heat gun perhaps?
I wired up an attenuator in for my factory amp to install an aftermarket radio in my WJ. I used a hot air station like this one (using its smallest tip)
CREWORKS 858D Rework Station, 110V SMD Soldering Rework Station with Hot Air Heat Gun Set, LED Digital Temperature Display Screen Electric Desoldering Welding Iron Kit for Electronics Repairing - - Amazon.com
Under the hood, I had to flip my ignition coil connector so it would work with an aftermarket coil that had the pinout flipped. I used a hot air gun like this one because I couldn't hardly reach the location:
Heat Gun Kit 2000W with Dual-Temperature 5 Nozzles,Hot Air Gun 122ᵒF-1022ᵒF Heating in Seconds for DIY Shrink PVC Tubing/Wrapping/Crafts,Stripping Paint (2000W 2 Gears Temp Setting) - - Amazon.com