Player sticking to walls in 2D Platformer

I'm making a 2D platformer game much like the original Mario Bros. When my player hits a floating box he gets stuck for a minute before sliding off of it. I was watching a video about a month ago and saw an easy fix for this but I have spend the last hour on youtube looking for that and can not find it. Can someone tell me or point me to the fix? I thought it was just a friction setting somewhere but I cant seem to find the solution.

Thanks

 

http://prntscr.com/968t6w

Create a Physics 2D Material, set the friction to 0 and attach it to the Box Collider where it says 'Material' on your Player

Not sure if you've figured it out yet, but there ya go!

 

you want to detect if the player is next to a wall, then you want to stop any velocity in this direction if you'd like the player to slide down smoothly.

 

This is a really old post but i have to say: THANK YOU SO FREAKING MUCH