Icy / Slippery surface?

Hi,
I’m trying to create an icy area (Where the player slides down depending on its angle and has difficulty controlling its movement) in my game but I couldn’t really pull it off.
I looked for previous discussions on the subject but I couldn’t really get a good answer.

I’m not using character controller, my character simply moves forward on the X axis on demand.

I tried making a physics material with low friction but it had no effect

I had a trouble like this when the global scale were not right enough from the physic engine point of view (a ball was in fact going down slowly but without rolling). Did you try changing the scale of your world ?
If not, ensure that your character has a scale that is not too small (check lossyScale > 1) nor too high.