Detecting the use of private APIs

Question

I\'m being rejected on the App Store for using private instance variables in my app. The ivars I am supposedly using are most definitely not being accessed in my code, but I

Answer 1

I am using one or two static libs from third parties

Contact the third parties, requesting explanation, they wrote the code, they must know what's in there. They might have a forum or a comments section, where other users might have expressed these concerns already, and you can look for answers and alternatives.