I've tried both Turtle Wax with carnauba, and RainX. IMO, the former is better. Water beads better in the windshield compared to RainX. Tapos with RainX, nagiging brittle pa yung rubber ng wiper ko, kahit tropicalized Bosch wipers.

Another advantage para sa akin eh madaling punasan ang windshield na may turtle wax. Especially since open ang parking namin at work, pag-uwi ko talagang maalikabok. Para sa tamad na tulad ko, malaking bagay yun, hehehe