Leaky Indesit IS70C?

My dryer has started leaking badly when in use. The collection tray at the front/top of the unit does NOT contain any water after a long drying period but the floor is very wet and the room is very steamy and humid.
I've checked the tray/grille at the bottom of the unit and this is clear. I've pulled the unit out and there doesn't seem to be any parts I can take off to look inside, but there are two plastic tubes (one clear, one white) that run vertically from the base of the unit to a location close to the water collection tray at the top. One of these (white) has a kink at the top that could prevent water (?) from flowing but they are very small tubes.
Anybody got any ideas ?