You should consider buying the small, 6-oz (??) bottles that you manually apply with a towel/rag. In my experience, it works better but is more "work" to do.
Presuming you're now talking about their 16-oz spray that's $5.76, that's $0.36/ounce. If it was previously $4.76 for 12-oz, it increased less than 4¢ per ounce. Your call if you want to ditch them for that outrageous increase....
I just tried Griots Ceramic spray wax and it states it can be used on paint, trim, glass etc. When I used it I put it on the windshield and was pleasantly surprised. Works similar to rain X and is lasting pretty good.
I've been running slightly dilute RV potable antifreeze with great results. You can drink it, sanitize with it too;
and it is not toxic to breath like methanol based products.
But the time to buy was early Summer when WM was blowing it out for 2 bucks a gallon.
No wiper chatter due to the percentage of propylene glycol in the mix.