shortly after re-filling reservoir, the wiper nozzles plugged up. the gunk in the reservoir got kicked up when I re-filled reservoir and got into the whole spray system. use a wire clothes hanger with a bit of cloth pressed on wire by bending the end of the wire back over the cloth. use to clean the reservoir, what a mess. went from one end to the other of the system. a needle does no good in cleaning where the sludge is located in the nozzle. I had to use high air pressure to dislodge the garbage inside the nozzle. it took some time in working it loose. the reservoir is accessed behind the front right wheel well. may want to clean before it plugs everything up if needed