I checked out the wipers of my aunt's car that is brought 3 days back from one of her friends, which really works out worse when out in rain and does not wipe out water perfectly, I changed them 2 days back but still they are the same, is it like there is a problem with glass in front? It seems to look normal.

Are you sure that the wipers are the proper size and they're installed properly?

Otherwise, I wouldn't think the problem would be with the windshield unless there was a film of tree sap or something on it.

I actually feel it to be fine in front of the navigators place but not in front of the drivers place it works out worse. Just would take back to the mechanic may be it isn't possible by me.

Well, I know from experience that it can be tricky trying to install wiper blades yourself.

Now I wait till I'm having some other service being done on the car, and have the blades changed then.