The 44-year-old has been subject to continual jibes recently from his fellow contestants about his ability to finish Bushtucker Trials.
And now the radio host has slammed the Dingo Dollar Challenge for being set up for the campmates to fail.
During last night’s episode, Amir Khan and Jamie Lomas decided to pick chocolate cupcakes at Kiosk Keith’s Outback Shack after completing the task.
The group had to answer the following question to receive the delicious treats: “What percentage of the British public believe they have above average looks: 24 per cent or 34 per cent?”
Later in the Bush Telegraph, Iain unleashed a rant about the daily challenge and said the questions are “complete and utter balls”.
He complained: “These DDC questions are complete and utter balls you might as well just phone us up and spout gibberish down the phone because we haven’t got a hope in hell of getting the answer, it’s a fix!”
Fortunately, the campmates successfully answered the question and they all savoured a scrumptious cake each.
Also in the latest instalment, Iain released some fighting spirit as he defied Dennis Wise after he banned him from competing in Bushtucker Trials.
He volunteered to tackle the Deadly Departure Lounge task alongside Coronation Street actress Jennie McAlpine, 33.
The pair were forced to lick frogs and other slimy creatures as they attempted to unscrew dollars to win meals for camp.