macbook air 2014 graphics suddenly laggy, display missing colors

after cleaning my screen and keyboard (with windex, i know i'm not supposed to do that, but i've done it 100's of times without issue), my screen/graphics are suddenly not working right. i don't think any liquid/cleaner got into my keys as i use only a little bit, but i do mash the entire keyboard so i hit every key or a combination of keys. so i thought i activated something by accident (as my cat does on occasion sitting on the keyboard. i should have done it with my computer off, but i have done it a 100 times without issue.

i have the same issue as here: https://discussions.apple.com/thread/7492488

i started a new question because it would let me reply to that old thread.

anyway, the graphics are lagging (like new windows and text fade in, slowly) and cursor movement are traced. also, i'm missing colors now, which results in whitewash appearance, although i'm in dark mode. but you can see the american flag at the top is not the right color.

here's a link to a screen recording of what i'm describing: https://youtu.be/TCVMn3gTPj0

anyway, the computer is working fine except this issue. i reset SMC, pram/nvram, disconneted the battery, toggled auto brightness, etc to no avail. it seems like a graphics card issue. whether or not it's a coincidence of having cleaned my computer remains a mystery. apple hardware test found no issues.

any ideas?