Mystery Squeak from Dash

Hi I really need some help. I have a mystery squeak that sounds like it's coming from the dash of my 2018 Mazda CX7. This is what I know and have tried.
It comes and goes randomly. It's not belts - I sprayed them with water and it still occurs. It's not the A/C - it still happens when its off. It only happens when moving from 20kph to 110kph. It happens on very smooth, 'straight' roads - not steering, not suspension. It's sound like rubber on metal. I've opened the door whilst is occurring and it doesn't change. It happens when the car's cold and hot. When the weather is wet or dry, hot or cold. This is doing my head in... Video/Audio file attached.. This is a right hand drive car.
 
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