For a long time my drivers side nozzles have been failing, to the point of nothing coming out, being an engineer I concluded that the pump had failed since the nozzle was at the end of the line, wrong.
It requires the removal of the bumper and headlamp to get at the reservoir and pump, not something I looked forward to. The next opinion was that the hose had come off to that nozzle, to get that out showed a tool similar to the cluster tool, I finally attacked it by pushing the pin all the way tru, I found one and the other by reaching into the opening, when I got the assembly off (dont remove the hose clamp) it pulls off the elbow. I got dirt, slime, and whatever, it would not clear by air hose or the invasion of needles from the sewing basket. After soaking it, blowing into it and sucking (terrible taste) and running a drill bit into it it cleared, more junk. I emptied the reservoir twice when the hose was off, and refilled it.
I re-installed the nozzle after installing the hose to make sure, the assembly of course is heated. The nozzles side in and up into the sheet metal and then those pesky pins are slid in.
I am so proud of myself, I did attract attention "why is that fool under the hood, and how do you get that hood to stand staight up, why not take it to MB".
South Florida condo living is nice, I miss my garage, I only moved my full triple decker "Craftsman cabinet" everything else went at the garage sale.