I am trying to make a working tube slide but the ball keeps bouncing off it instead of going in (this is using the unity essentials) how would i fix it.
Could you explain when’s the ball bouncing and what kinda shape does the tube have?
Any pictures or videos would help. 
use mesh collider and do not check the box that says convex.
Could you also share the picture of the colliders or a video of what’s happening?