Method of discouraging stowaways in wheelwells.
The problem was solved in 1997. See the movie "The Fifth Element". The pertinent scene takes place as the Floston shuttle is readied for takeoff.
From the screenplay:
<Buzzer sounds in the flight deck>
MECHANIC: Tell the ground crew we've got parasites in the landing gear.
A GROUND CREW MEMBER goes over to the truck parked under one of the
plane's wings and bangs on the side of it with a shout.
GROUND CREW MEMBER: Disinfecting!
Two DISINFECTORS in hermetically sealed suits exit the truck. They
go over to the front landing gear and send up a whooshing beam.
The flame burns everything it touches. A pack of repugnant creatures falls squealing from the landing gear.
Now if we can just solve that pesky problem of inflammable tyre rubber, paint, and hyd fluid............