Try filling up your windshield washer bottle completely. They are set at such an angle that if one small hanger breaks, all the fluid will slosh away from the sender, and it won't deliver the fluid. I thought mine were clogged, but it turns out I've just got to keep the thing half full or better.
Or you could always pop 'em off and put on some nice LED ones! They are called COBRA eyes...
I used some stuff called "CLR" (Calcium, and Lime Remover) that I found at Walgreen's. Put some in the water and sprayed them for awhile. The next morning it was unclogged. I will probably add it every few months to keep them clean.