Spider plant dull and droopy

I grew this spider plant from just a lil guy, but the color is looking really dull these days and the leaves are quite droopy/floppy.

I water it about once a month

Third photo is where I have it placed, it’s a few feet from a south facing window.

Last photo is context of what it used to look like — a lot more vibrant green.

How do I get it back to being a vibrant green and not floppy leaves? Thanks in advance!