I'm pretty sure Kincaid is using Ignite (p. 293 SR5) to light his cigarettes.
As for a spell to resist insects, sure. Bug Zapper is a version of Mana Barrier that's tailored to insect spirits, so I don't see any issue with creating a version of Physical Barrier that's tailored to regular insects. You could just use Physical Barrier with a low Force, since the insects wouldn't be strong enough to overcome it. Or if you didn't want to be casting and recasting all the time, create an insect-specific version of Physical Barrier. I'd make it the same spell, maybe knocking 1 or 2 off the Drain.