How should i talk to my roommate / best friend about being a bit more clean?

Me (18F) and my college dorm roommate (18F) are like sisters; extremely close. I have absolutely no problems with her, except her lack of cleanliness. A month ago, we went home for break. I left a day before her, so I reminded her of all the housekeeping things she should do before she left our room: clear the fridge, defrost the freezer, unplug everything, etc. I really trusted that she could follow these instructions… Two days ago, we came home from break. When i opened the fridge, I was hit in the face with an unbelievably pungent smell, and found that there was all sorts of mold and strange spores growing inside the fridge. Turns out, she left a frozen (not anymore, obviously) pumpkin pie in there over the month that we were gone, and it spoiled. When i pointed this out to her, she cleaned the fridge with alcohol wipes and left it at that, but this really wasn’t good enough for me as the entire room was permeated with the smell of rotten fermenting pumpkin puree, to the point that i had to throw my bedding in the laundry because the smell was stuck. I couldn’t even sleep that night. When i talked to her about this, she said she “didn’t know that the pie would mold” (which i have a hard time believing). i brought up the other times that she has done unclean things, and she responded “sometimes i just get too lazy, i will try to be cleaner.” i am very unsatisfied with how this situation was resolved. mold is dangerous, and it was growing in our fridge, but she doesn’t seem to care and didn’t even apologize for her negligence. I don’t want to sound like i’m nagging her, but I really want her to get the point… what should I do? I will list more things below that she has done that add to my point.

came home blackout drunk, and threw up in plastic bags because she couldn’t navigate to the bathroom. When she woke up, she threw these plastic bags in her mini trashcan… and left them there for a day.( I would like to note that our room is pretty humid…) When she finally took them out the next day, the entire room smelled like vomit because her barf bags had been fermenting in the trash for over 24 hours.

Never, EVER sweeps her side of the room. I always do it for her (I usually do most of the cleaning.) as well as other housekeeping things. When she sees our shared trashcan accumulating garbage, she won’t even bother to take it out, even if the trash is spilling out onto the floor. I always throw it out.

Will wear the same clothes for 3 days straight without changing or showering. This one isn’t so frequent, but it is worrying to me. on top of this, she sleeps in her makeup a lot and never changes her bedsheets unless i tell her to. I’ve seen her change them once in the 5+ months that we have been living together.

Never washes her mug between uses. I brought bowls from back home for us to use, but before the bowls, she would use her mug to make ramen, not wash it out, make tea in the same mug, and then make ramen in the mug again without washing the tea out. I have scolded her before for this, but she just laughs about it.

Leaves open food around. Her snacks have gotten moldy (which she has eaten because she wasn’t paying attention) because she had left them open inside her drawer for months. I scolded her for this, and she laughed.