When I tried it a couple times it also left white water stain spots where it dried (and all over the black wiper arms). Had to work to get the stains off.
I use mostly blue -20 PEAK in the 6 pack case from Sam's club. Randomly I'll do some of the -30 purple from WM. 6 cars in fleet that are always in use, I go through a good amount.
I use Aquapel on front windshield. Rain-x elbow grease method on sides and rear. I also might do sides/rear with ceramic wax, graphene. Front might get Rain-x and other water repellents (flyby30) and other coatings depending my supply stock of other stuff and how much time I have.
What I never liked on front windshield with Rain-x was the buildup of gummy stuff along wiper edge. Aquapel and other versions don't do that and last longer. Rain-x works well, inexpensive, works at a lower speed than Aquapel.
I try to do all my lights also especially of going to snow/ice.
I also experienced frozen reservoirs on others cars so I personally don't buy the summer bug wash ones. I use the -20 stuff year round. If I was in warmer area, maybe I'd see about changing.