This is the first in a new category of entries. Pentagon Truthisms:
#1 If you bend your knees when you swipe your access card it's much more likely to work.
At first I thought people were just bending their knees because their neck loop that hold the access card wouldn't reach the swipe bad if they didn't lean over, but once I started paying attention I noticed that 'everyone' does this, even those who don't use the typical neck loop.
Other variations of the knee bend include the 'swipe and step' wherein if you step immediately toward the door without seeing if you got the green access light it's more likely to work.
What's the most number of times you've had to swipe your card to get the green light? I think my record was about 16 times.