I also am thankful to Lofty, however I did it with a few variations:
The oven cleaner, Dr Magic, came from B&M stores for 99p (same stuff).
Fitted a more convenient aerosol nozzle that I had in my garage (always save these!).
Used 1/4" pvc pipe which is a bit stiffer than the silicon, length of travel into turbo was just over 8 inches.
Like J.R. in post 342 , I used a 24" piece of aluminium tube, flattened and slotted, to pump the actuator arm down to its stop (its return spring is quite strong). Dowel would also be ok.
Initially I had to give the tube a light tap to move the arm from its seized position.
