Hosing them down again

Another good hosing down for the ducks who are still refusing to go in the pond.
I dont know what is wrong, they loved it, then 5 days ago they stopped going in and decided to inhabopit the garden, mainly the decking.
We have emptied and cleaned the pond, filled it up again but no, if I try to put them in they just fly off.
Any duck people in blip world?