The windshield washer fluid suddenly stopped working. Upon investigation, I discovered that the hose had become disconnected.

Here’s the washer fluid reservoir:

Hard to tell, but the disconnected hose is hanging down in the foreground:

Looking up inside the front cap, I can see a T-junction where the hose should go:

So I re-connected the hose, and used a small zip tie to hold it in place (and pushed the other two hoses fully onto the junction):

It’s working well again now.