Seeing that Packard yesterday inspired me to install some parts on my own humble Yaris, beginning with new windshield wipers. According to one source I consulted, you should replace your wipers after 50 hours of service. But since that can be a pretty hard figure to calculate exactly, I prefer my method, which is to replace them whenever I feel like or when they begin to squeak or chatter.
Which wipers to buy? Well, I'm not sure it makes a lot of difference, since we should be replacing them more often than we do. Still, I've had a fairly good experience these last two go arounds with Bosch wipers. This time I bought the more expensive Envision wipers only because they came with a 10% discount AND a free gallon of windshield wiper fluid. (Not sure what I'm going to with that since I already have most of a gallon left. But . . . it seemed like a good deal, so I went with it.) Here's what they looked like still in the box. BTW, I had to order the rear wiper blade myself through Amazon, since the attendant said her store didn't carry them. Not sure what THAT was about! I think she just didn't look very carefully at her inventory list.
Wishing you all clearer vision of the road ahead. :-)