Screw seized on door panel

[4thgencreamsicle]

I have 2 screws left on the driver’s side door panel that are seized. I have been regularly hitting it with PB blaster which has worked wonders on everything else so far, but still those 2 won’t budge. I’m guessing since it’s a vertical surface the oil isn’t soaking down into the threads as good as it could be. The heads are starting to strip so that’s a second problem. I did get one out yesterday with a screw extractor and an impact gun at low speed, but that was touch and go. So now I’m left with these 2 and I have so much work to do on the doors.

Am I completely missing a trick of the trade here? What can I do to get these stupid bolts out?!

PS: Go easy on me, I’m a girl.