wash the area and then dry it good. wipe the area and put it on and press it really hard. be careful of pressure washers, they blow them off.
Reflective tape.If you're out in the woods, you can use a headlamp. In traffic, headlamps are often not allowed due to the risk of dazzling other motorists.
Yeah, its a law, and just plain stupid not to
inside the axle
I don't think you should for safety purposes