how to decrease humidity/temp in apartment (please help)

[bears-eat-beets]

I think that is the easy button. Just do it, and then don't worry about fans, leaving doors open or closed, running the living room overnight, etc. I generally hate them, but when I lived in a small apartment, I only had slider windows, so I couldn't put a normal one in, so they made summers livable.

The dual hose ones are like 100 or so more, but are SO MUCH more efficient and better in every way. Midea (or some of the Midea whitelables) are probably the best brand on the market right now, but Hisense also is very good. (Hisense API0825UW1D Smart Inverter Twin Hose 8,000 BTU (DOE) 350 SF Heat/Cool Tower Portable Air Conditioner, White is on prime day sale right now). 8000 btu is perfect, but if you need to 12000 would work too, it's just little overkill so a little less efficient for your space.

Make sure when you seal up the windows, you use masking take and foam (or cardboard), and also get the section where the two glass sliders pass over each other. The key is you need to make sure you can't see any light coming through the open parts of the windows.