My base tags will not stay on my car. We've been through three sets in three months and just got a set two weeks ago. We finally just taped them to the inside of the window because they will NOT stop falling off. The AF guards didn't care, but yesterday when I went onto the Army base, the guards took away my tags because they *have* to be on the outside of the car. When I explained that they won't stick to the outside of the car, the guard said that I must be lying because tags don't fall off cars. So my question is, has anyone had their tags fall off a car, and what did you do to keep them on? And yes, I cleaned the window before putting them on.