I can't remove splash screen image in iOS Simulator

Clean the project (in xcode :-) ), remove any installed version of your app on the simulator (if you want, reset the simulator, it will be more efficient), go into the finder and with a rightclick on your xcode project, open the package and check if there are no included source file into it (.m, .h, resources, ...), including your image. If there are, move them out and update the needed one into your project. Then clean your project again in xcode, build, run.

Does this work ?

in xcode you need to do a build clean, then delete the app from the simulator, then build and run.