Message ''disc is dirty'' appears

now u need to clean the player:

Be careful how you use this, but u can utilize canned air to blow out the debris from your player.
get a laser lens cleaner kit from walmart or something, it will cleans your laser lens inside the dvd player for you, if the canned air and laser lens cleaner doesn't work, your last resort is to completely unplug the player to see if it resets itself, if none of those works i would turn the player in under warranty or take it back to the store.