Found a bug with the pathing of the insects (pun unintended). If you kill enough insects on where they spawn, they get blocked off and gets stuck on that corner.
The corpses of the insects seems to block their pathing off. This made the final 1:00 minute at least doable for me, as I only needed to stomp on that one corner (final life around 5 out of 100 I think).
And yes, in the final minute, the fusebox will go off without any rest, so I focused on stomping insects, then taking out the fire.