It is not a 'leak' .It is water condensing from the fridge due to it being cooler in the fridge than outside. There is no way to prevent it , you just have to mop it up.
Hoppy I pulled out fridge the other day to clean floor and looked at that tray - was looking for water but it musta evaporated or perhaps stayed in the fridge to cause that leak
Bought the net curtain wire - 2 metres (it came in a pack) anyhoo - still only went down the length of the straw when it sorta hits something like steel.
May try and look for an 'ole at the back of fridge tomorrow - if anybody has any other ideas I could try.