It works fine with the side mirrors and side windows, except the front windscreen. As far, I have not applied on the rear windscreen. I will upload the photos tomorrow as the photo quality is not good at night.

@lifeless_creature, it is definitely not from internal. It has not issue before using the WM removal. I washed the glass again with car shampoo, and cleaned with WM removal. Unfortunately, it doesn't work.

Let me be the first to cast the stone to gather the ideas that might caused the problem. Would it possible that the windscreen coming with a coating, and the WM removal has damaged it?

P/S: My car is the latest model of Toyota Vios.

Many thanks Mot88. Will send the car to expert this time round. But what would this treatment called? Any car saloon will do the job or must be a specific car saloon?