iPhone 5 pressure marks after screen replacement
I have an IPhone 5. it is 1.5 years old. After that time I had no more factory warranty and the battery started to last a very few hours. So I got a new one from Amazon.com. I replaced the battery but I pulled too much the screen and the screen didn't work anymore. Having learned a big lesson from this mistake I took the iPhone to a store for an experienced technician to change it. He changed but we could not test it because the new battery I installed was not charged. So I went back home and at the next day I found that the screen looked great !!! But when I touched (with normal very soft pressure) some dark translucent clouds appear. only on the places I touched. They stay for some 10 seconds with single pass or soft pressure of my finger, but they can stay for up to 5 minutes if I press a little harder or pass my finger to much times over the same place, then after they always disappear. They can appear anywhere on the screen anywhere where I touch it. There's no difference in the color or shape of the marks considering the place where I touch the screen. The marks are gray. No any other color at all. Besides that the screen looks perfect. I wonder if the problem is caused by a bad installation or a bad screen or by a bad battery installation.
Click in the links to see some examples:
Thanks in advance for any help.