All I've done so far is pull the wiper arms off, and the little rubber covers underneath those, and spray in some genuine silicone lube, and then turn wipers on to let the lube work its way down, to see if that helps. Do you have a photo showing what it looks like under the cowl or the wiper rods/wiper motor area??
I left the B2200 up there and drove back this morning in the 2004 Frontier to spend Easter with family, and I'll be driving back up Sunday afternoon.
Then coming back to Phx Monday afternoon, back up there on Wed., then returning Thursday afternoon for weekend funeral service of a neighbor and my high school reunion. April is a busy month !!!