This method works along with the trusty old squirty water bottle, and of course the blue alkathene pipe.
Forget your rentokill phostoxin applicators too, ive had gas explosions on two seprate occasions within the applicator, thats using it on a damp day (not wet).
The bloody things jam up whilst dispensing tablets and if you get mud within the button mechanism then forget it.
More hassle than they are worth