OK, I'm probably being obsessive and returning to the safety razor. Should have stuck with it all these years.

How do you keep track of the edge you are using so as to maximize the number of shaves you get? Do you use one edge exclusively and switch to the other when it starts to pull?

Do you use one edge on one side of your face and the other edge on the other side?

Do you just use an edge at random, throwing the blade away when one starts pulling?

OK, I'm obsessive compulsive.