Used to work with clifford remotes and I tried it tonight on the FF, put the metal part of the key under your chin (as if you are going to stab yourself) you will find it works from MUCH further away, useless I know but interesting as your body acts as an aerial !!!  One day your life will flash before your eyes......................................make sure yours is worth watching!

Door lock remotes are the same... If you shoot yourself in the head with it, so to speak, it greatly increases the range. Previously..
Vogue SE TD6
Defender 90 2.4
Defender 110 TD5
Vogue 3.5 EFI

A better trick is using the IID Tool and activating the beeping for lock and unlock