Some backstory, I've lived with my current roommate for 2 years now, and I'm moving out in about a month because of the location and the fact that I'm no longer enjoying our living situation due to many factors and tensions over the course of living together. We currently aren't really talking, not due to a big fallout but because we just slowly talked less and less and it just became almost zero communication other than hellos and goodbyes (although the past couple days she has ignored me when I say those as well.)

We had an incident a couple weeks ago where I hadn’t noticed that I left part of the counter messy for a couple days, and she told me she was upset that I hadn’t cleaned it yet. I apologized and cleaned it. 

There was a period a couple days later where I had come home to the kitchen absolutely trashed about 5/7 days of the week. As in food, trash, and cooking utensils on almost every surface. I felt quite justified in saying if she expects me to clean up after myself (a completely reasonable request) that I should be able to expect the same from her. She said she noticed and it that she was sorry, but she ended up bringing it back around to my clean up and how she was really annoyed that I just hadn’t cleaned it up.

There was more to this conversation but at one point I said if it bothered her that much she could just clean it herself, and she responded it’s not her job to clean up after me, which I agreed to, I just didn’t feel the situation required an angry response.

Here’s where I wanted to ask if I’m the asshole. There have been two areas on the counter and our dining room table that have been sticky and gross for a couple days now from her cooking/eating. I believe she didn't notice, and I brought it to her attention, not exactly politely but not rudely either, and asked her to clean it, using the words that she had said to me in the previous incident.

She said sorry, and that she may have missed something when she cleaned after she cooked, but now she is ignoring me and it is still not cleaned.

Am I the asshole for not just sucking it up and cleaning it myself? What I did feels petty to me as it's really not a big deal and it is relatively easy to clean. I only have a month living here left and I'm trying not to make it a hostile living environment, but it feels very hostile, not only because of this but other things in the past. I could have easily avoided an argument and simply cleaned it myself, like I said to her about the first incident. Am I being a hypocrite?