I´m new here so if what i´m am going to say has allready been told,...please forgive me. (I allready used the search, and found nothing)
So let me share something very simple but that allready "saved my life" a couple of times.
For opening unlocked doors, instead of a credit card, I use X-Ray paper beacuse its very hard, resistent/flexible it allows you to pass those L angles without loosing force.
This kept me from sleeping in the doghouse a couple of times

p.s. Moderators: if this is not the right place for this topic, please move it.
p.s. sorry for my english.