To prevent clogging, remove push button and rinse it in warm water after each use. Make sure that the push button is completely dry before putting it back onto the can. This will prevent water from trapping on the top and causing rust to form.
When replacing, line up the black dot with the red dot. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.