What kind of tape works on our dashboards?
 

I tried sticking a scosche mount on the dashboard, but it just would not stick. Does anyone know what kind of double sided taped actually sticks on the plastic rubbery dash?

Scoshe mounts usually use thin tape, the dash has a texture.
Get something thicker and make sure the dash is clean.
Or just stick it somewhere else that is flat with no texture.
And avoid anywhere that is exposed to the sun, or it will just fall off sooner than later.
You can also use adhesion promoter(at your own risk).