I suggest u to change ur digitizer. it will cost u arround 2000. I also changed but not for any screen issues.I bought lenovo A6000 on 22nd march 2015. It was working very well but I met an accident for which the screen damaged.But trust me it was working like before .i used for some months with that broken screen and now I changed the digitizer. It is like new one. your screen problem will also be solved .after all it is electronics item.i will also suggest to buy a lenovo brand mobile if u want to buy a new one.u can also go for vivo.