Hey everyone! I'm probably just worrying again, but I want to check and rule out any possibilities! Rather be safe than sorry! I've had my girl for over a month now.

My 2.5ish year old girl, Nagini, shed about 4 days ago on Friday! It was all in one piece (very proud mama) and she dropped a nice big POOP and urate right after, so looking healthy there! She spent her entire shed in her warm hide, however, immediately after shedding, she goes straight into her cold hide and has been in there for the past 3 days straight (it's Monday)... I know they will pick and choose when they want, but it is pretty cold outside and I'm just worried as she usually goes between the two hides regularly.

I also tried feeding her the day after she shed, thinking she would be hungry, but she refused to eat, which she has never done. I thought it was maybe the rat's size as it was a tiny bit larger than usual, so I brought her a smaller rat 2 days later (today) and she still does not want it. She sniffs at it- getting so close she is literally touching it but then just turns her nose up at it. I know BPs also go on hunger strikes, but she has never refused a meal and usually has striked at it before I have even completely gotten it inside lol (greedy gal). If this is a hunger strike, how many times refused before I know that? Should I keep offering weekly food?

I am trying not to stress her out- I only took her out once to feed and change substrate on Saturday and then today.

LASTLY, I noticed some "dirt" around her snoot- I see this on her rather frequently actually cause she has a habit of digging. I've caught her doing it a couple times and it's actually extremely adorable lol But I attached some pics, just in case? This isn't mucus or mouth rot, right?? (Also enjoy her dorky little face). Should I be attempting to clean this off? I usually just leave it as I don't want to bother her and there's never A LOT of it, so I generally just let her be her weirdo snake self.
https://ball-pythons.net/gallery/fil...4/img_4917.jpg
https://ball-pythons.net/gallery/fil...4/img_4920.jpg
https://ball-pythons.net/gallery/fil...4/img_4922.jpg

Anything to worry about?

Her husbandry: one hide on each end (cold and hot), both are enclosed little hides with just an entrance hole and she seems to love them both up to now. Warm hide has UTH under at exactly 90-91F, checked regularly and controlled with thermostat- the probe is sandwiched between UTH and under the tub. Ambient temps are as close to 80F as I can get them to stay, but usually lingering around 78F- using a heat lamp with thermostat as well. Humidity always between 50-60% and 70% during her shed. All of this has been consistent since I got her, so nothing has changed dramatically about it recently!

Appreciate your input!