Then it's the water from the aircon condenser, maybe the drip line is block and water is accumulating and being blow into the air duct.

Was it wet/raining outside when this is happening?

Just noticed it today. It’s not a lot of water, but I could feel it on my ankles and it looks like someone sprayed a spray bottle on the floor mat and it makes a noise (almost a hiss? But not quite?) when turning hard left only. Husband wiped the liquid up and it’s colourless and odourless so I assume it’s water. 

Wtf is this?

2017 rav4 LE - water from air vent on passenger side and weird noise only when turning left?