Need Help With Fragile 5-Week-Old Kitten (Hypoglycemia, Breathing Issues, Fleas)

We rescued a tiny kitten on Nov 13th. She was wet, cold, lethargic, and had dried blood around her nose. The ER gave fluids and gabapentin and told us not to feed her, but she declined and we rushed her back.

At the second ER visit they suggested euthanasia, but I asked them to check her blood sugar. she was severely hypoglycemic. After dextrose and warming, they sent her home. She has now been with us for about 15 hours since the crash.

We are doing:
Small formula feeds every 1–2 hrs
Karo syrup on gums when needed
Blood sugar checks (so far stable)
Keeping her warm
Steam bathroom sessions for breathing fits

Current concerns:
Breathing fits when waking (fast, open-mouth, “bubble” sounds)
Very hazy/glassy eyes
Slow responses and occasional small twitches
Dried blood still in nostrils
Fleas, and she’s too tiny/fragile for strong treatments

She’s about 1 lb 15 oz and estimated 5 weeks old. She settles between episodes and hasn’t crashed again, but she’s still very fragile.

I need advice on:
1. Safest flea treatment for a medically fragile 5-week-old
2. Best way to clear her tiny nose of dried blood
3. What breathing signs mean danger
4. Whether neuro symptoms are normal after severe hypoglycemia