Help getting rid of old AppleID on iPhone 6 and iPad2
I recently changed my AppleID, but my old ID is still on my iPhone and iPad--I can't update anything. I know I have to sign out of all my devices using iCloud to update them.
However, my iPhone and iPad still use my old ID and ask for my old password to sign out--as recommended to use my new AppleID on other devices -- I have tried several of what I thought were my old passwords, but they don't work. My old ID is no longer recognized as an AppleID, so I can't change the password. How do I get around this?
iPhone 6, iOS 9.3.2, Also iPad2