Rigidbody Not Sliding Down Slopes

Hello everyone, I've got a problem where a rigidbody object (in this case the player), won't slide down a steep slope. The player material is ice, the ground material is also ice, and the slope varies from maybe 20 - 50 degrees...and the rigidbody just will not budge at all if the player is stationary. If the player moves onto the slope with some sort of velocity, everything seems fine.

So, is there a way to fix this "infinite friction" issue? To get the rigidbody to start sliding down even when it has no previous velocity?