Here are some tips to ensure that your screen protector is successfully installed: We recommend that the screen protector be applied while the case is on the device to ensure that the screen protector is precisely centered and aligned for proper installation. Before beginning, make sure to wash your hands thoroughly and wipe your screen with the microfiber cloth and the included screen wipe. Most of our screen protectors also come with the dust remover stickers to pick up any excess dust on the screen. The screen should be free of any dust particles or debris. Make sure the surface you are using to apply the installation is clean and stable. Once installed, remove any air bubbles by gently pushing the bubble outwards towards the edge of the screen protector. Please refrain from using excessive force when installing or removing the screen protector or it may cause damage to the product. We do not advise for the screen protectors to be reused as removing them for reinstallation may damage the adhesive properties of the screen protector.