The wipers on my car have been screeching since I bought it about three years ago. I put new rubbers on them a while back, but that didn’t fix it. I don’t drive in the rain frequently enough for it to be a major bother, but yesterday, I was near a Supercheap Auto, so I went and spent the money on some good quality replacement blades.
They work smoothly and perfectly. After three years of screeching, a silent wipe is almost unfathomably satisfying.
In newer vehicles with washer fluid level sensors, rainX washer additive can cause the level sensor to stop functioning correctly and always think the tank is empty and you get a light on the dash, otherwise AFAIK no other issues
I’ll take being able to see at night in the rain over a light on the dashboard any day.