Grabbed a sewing pin from my wife's sewing kit and poked around the nozzles.
If that didn't do, I took out the pick tool from my toolbox. Also useful to align the nozzle stream.
Not sure which car you're pertaining to, on my former 190E the washers were strong. It had new nozzles and new pump. My w123 300D, I don't use the washers as much but the strength of the stream appears weaker. I removed the originals (2 nozzles on driver side, 1 on passenger side) and replaced with new (2 nozzles per side), but the pump is original. Maybe I'll swap the pumps over.
