Pretty awesome auto-broom addon for the Solidoodle. Uses a little bit of extra friction on the nut to lift/drop the arm onto the plate. Obviously the problem is adhesion changes as prints happen…but might be worth replicating elsewhere. 
https://www.youtube.com/watch?v=xef6TdkXVxY
A tougher arm could push razors under the print. Works plenty well as long as you aren’t using tape.
Uhu stic and allow the bed to cool and it will just slide off
^^ That’s a better plan. My home printer doesn’t have a HBP so I always forget about them.