Question: How do you kill all heroku workers?

I have tried:

`heroku scale worker=0`

and it doesn't work.

Answer: 
Have you tried logging into the web interface and manually changing the number of workers to zero via the up/down slider?

That is, log into heroku, go to your app's `Resources` page, and drag the "Worker Dynos" slider to zero, then save the changes via the "Save and Apply" button on the top-right.

![enter image description here](https://i.stack.imgur.com/sT8f0.jpg)
The current way of scaling dynos is:

```
heroku ps:scale worker=0

```