My kitchen sink sprayer makes a loud whistling sound when I use it. It just started about a month ago. It's such an obnoxious sound that I'm finding myself wanting to just not use it at all. I'd like to know if there's a way that I can fix this myself, and if so, I'd like the easiest steps possible to follow, as I'm not exactly good at home projects other than making things look pretty.

Any help would be greatly appreciated!
Thanks!