In my experience, the 303 wiper treatment doesn't work very well. My blades are the OEM equivalent to Bosch Icons; I cleaned with IPA wipes, applied the treatment, and let it soak before thoroughly wiping it off. The blades were perfect before the treatment but became streaky afterwards, and didn't normalize until a couple days later. I still have a bunch left, but I'm kinda turned off at this point.
303 aerospace protectant works well, but I really dislike how often you have to apply it for continuous UV protection. I'm too lazy and I end up using it only about twice a year.